diff --git a/.gitlab-ci/construct-flake-url.sh b/.gitlab-ci/construct-flake-url.sh
old mode 100644
new mode 100755
diff --git a/.gitlab-ci/make-minio-bucket.sh b/.gitlab-ci/make-minio-bucket.sh
old mode 100644
new mode 100755
diff --git a/.gitlab-ci/upload-to-cache.sh b/.gitlab-ci/upload-to-cache.sh
old mode 100644
new mode 100755
diff --git a/.gitlab-ci/write-minio-creds.sh b/.gitlab-ci/write-minio-creds.sh
old mode 100644
new mode 100755
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
new file mode 100644
index 000000000..32afb2154
--- /dev/null
+++ b/.pre-commit-config.yaml
@@ -0,0 +1,9 @@
+# SPDX-FileCopyrightText: 2022 Sarah Vaupel <sarah.vaupel@ifi.lmu.de>
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+repos:
+  - repo: https://github.com/fsfe/reuse-tool
+    rev: v1.0.0
+    hooks:
+      - id: reuse
diff --git a/CONTRIBUTING b/CONTRIBUTING
new file mode 100644
index 000000000..ff367d524
--- /dev/null
+++ b/CONTRIBUTING
@@ -0,0 +1,33 @@
+Version 1.1
+
+Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+
+Everyone is permitted to copy and distribute verbatim copies of this
+license document, but changing it is not allowed.
+
+
+Developer's Certificate of Origin 1.1
+
+By making a contribution to this project, I certify that:
+
+(a) The contribution was created in whole or in part by me and I
+    have the right to submit it under the open source license
+    indicated in the file; or
+
+(b) The contribution is based upon previous work that, to the best
+    of my knowledge, is covered under an appropriate open source
+    license and I have the right under that license to submit that
+    work with modifications, whether created in whole or in part
+    by me, under the same open source license (unless I am
+    permitted to submit under a different license), as indicated
+    in the file; or
+
+(c) The contribution was provided directly to me by some other
+    person who certified (a), (b) or (c) and I have not modified
+    it.
+
+(d) I understand and agree that this project and the contribution
+    are public and that a record of the contribution (including all
+    personal information I submit with it, including my sign-off) is
+    maintained indefinitely and may be redistributed consistent with
+    this project or the open source license(s) involved.
diff --git a/CONTRIBUTING.license b/CONTRIBUTING.license
new file mode 100644
index 000000000..9cc762a8e
--- /dev/null
+++ b/CONTRIBUTING.license
@@ -0,0 +1,3 @@
+# SPDX-FileCopyrightText: Copyright (C) 2004, 2006 The Linux Foundation and its contributors.
+#
+# SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/flake.lock b/flake.lock
index ed9736994..dedb5ba85 100644
--- a/flake.lock
+++ b/flake.lock
@@ -25,12 +25,12 @@
         "rev": "40393c938111ac78232dc2c7eec5edb4a22d03e8",
         "revCount": 62,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/HaskellNet-SSL.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/HaskellNet-SSL.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/HaskellNet-SSL.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/HaskellNet-SSL.git"
       }
     },
     "cabal-32": {
@@ -92,12 +92,12 @@
         "rev": "f8170266ab25b533576e96715bedffc5aa4f19fa",
         "revCount": 153,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/colonnade.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/colonnade.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/colonnade.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/colonnade.git"
       }
     },
     "conduit-resumablesink": {
@@ -109,12 +109,12 @@
         "rev": "cbea6159c2975d42f948525e03e12fc390da53c5",
         "revCount": 10,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/conduit-resumablesink.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/conduit-resumablesink.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/conduit-resumablesink.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/conduit-resumablesink.git"
       }
     },
     "cryptoids": {
@@ -126,12 +126,12 @@
         "rev": "130b0dcbf2b09ccdf387b50262f1efbbbf1819e3",
         "revCount": 44,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/cryptoids.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/cryptoids.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/cryptoids.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/cryptoids.git"
       }
     },
     "cryptonite": {
@@ -143,12 +143,12 @@
         "rev": "71a630edaf5f22c464e24fac8d9d310f4055ea1f",
         "revCount": 1202,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/cryptonite.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/cryptonite.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/cryptonite.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/cryptonite.git"
       }
     },
     "docker-nixpkgs": {
@@ -176,29 +176,29 @@
         "rev": "22fc3bb14841d8d50997aa47f1be3852e666f787",
         "revCount": 162,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/encoding.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/encoding.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/encoding.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/encoding.git"
       }
     },
     "esqueleto": {
       "flake": false,
       "locked": {
-        "lastModified": 1625584503,
-        "narHash": "sha256-kgNcNKODv4xkmS6+MKDAVDpbL/IQ5Imucst0uV4HzYU=",
+        "lastModified": 1648739688,
+        "narHash": "sha256-rtKhMti9GNq0i7ngTLuNXIyr3zSUTh3G8anXPrKirTk=",
         "ref": "uni2work",
-        "rev": "b9987d94af9d7403eded8ca75ad761eb7fc06e4c",
-        "revCount": 697,
+        "rev": "e18dd125c5ea26fa4e88bed079b61d8c1365ee37",
+        "revCount": 708,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/esqueleto.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/esqueleto.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/esqueleto.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/esqueleto.git"
       }
     },
     "flake-utils": {
@@ -319,12 +319,12 @@
         "rev": "01afaf599ba6f8a9d804c269e91d3190b249d3f0",
         "revCount": 61,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/ldap-client.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/ldap-client.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/ldap-client.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/ldap-client.git"
       }
     },
     "memcached-binary": {
@@ -336,12 +336,12 @@
         "rev": "b7071df50bad3a251a544b984e4bf98fa09b8fae",
         "revCount": 28,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/memcached-binary.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/memcached-binary.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/memcached-binary.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/memcached-binary.git"
       }
     },
     "minio-hs": {
@@ -353,12 +353,12 @@
         "rev": "42103ab247057c04c8ce7a83d9d4c160713a3df1",
         "revCount": 197,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/minio-hs.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/minio-hs.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/minio-hs.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/minio-hs.git"
       }
     },
     "nix-tools": {
@@ -498,7 +498,6 @@
           "nixpkgs-unstable"
         ],
         "serversession": "serversession",
-        "tail-DateTime": "tail-DateTime",
         "xss-sanitize": "xss-sanitize",
         "yesod": "yesod",
         "zip-stream": "zip-stream"
@@ -513,12 +512,12 @@
         "rev": "b9d76def10da1260c7f6aa82bda32111f37a952b",
         "revCount": 174,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/serversession.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/serversession.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/serversession.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/serversession.git"
       }
     },
     "stackage": {
@@ -537,23 +536,6 @@
         "type": "github"
       }
     },
-    "tail-DateTime": {
-      "flake": false,
-      "locked": {
-        "lastModified": 1576249828,
-        "narHash": "sha256-90okKfi5Nf5xw+IFsPXzdykdboLMbOYHmUVyNZS65Go=",
-        "ref": "uni2work",
-        "rev": "ef1237569ff22667acb64a9dfd64682ee55817eb",
-        "revCount": 132,
-        "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/tail.DateTime.git"
-      },
-      "original": {
-        "ref": "uni2work",
-        "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/tail.DateTime.git"
-      }
-    },
     "xss-sanitize": {
       "flake": false,
       "locked": {
@@ -563,12 +545,12 @@
         "rev": "dc928c3a456074b8777603bea20e81937321777f",
         "revCount": 114,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/xss-sanitize.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/xss-sanitize.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/xss-sanitize.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/xss-sanitize.git"
       }
     },
     "yesod": {
@@ -580,12 +562,12 @@
         "rev": "a59f63e0336ee61f7a90b8778e9147305d3127bb",
         "revCount": 5053,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/yesod.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/yesod.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/yesod.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/yesod.git"
       }
     },
     "zip-stream": {
@@ -597,12 +579,12 @@
         "rev": "843683d024f767de236f74d24a3348f69181a720",
         "revCount": 39,
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/zip-stream.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/zip-stream.git"
       },
       "original": {
         "ref": "uni2work",
         "type": "git",
-        "url": "ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/zip-stream.git"
+        "url": "https://gitlab.ifi.lmu.de/uni2work/haskell/zip-stream.git"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index 116a9d497..e8c0da651 100644
--- a/flake.nix
+++ b/flake.nix
@@ -13,66 +13,62 @@
   };
 
   inputs.encoding = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/encoding.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/encoding.git?ref=uni2work";
     flake = false;
   };
   inputs.memcached-binary = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/memcached-binary.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/memcached-binary.git?ref=uni2work";
     flake = false;
   };
   inputs.conduit-resumablesink = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/conduit-resumablesink.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/conduit-resumablesink.git?ref=uni2work";
     flake = false;
   };
   inputs.HaskellNet-SSL = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/HaskellNet-SSL.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/HaskellNet-SSL.git?ref=uni2work";
     flake = false;
   };
   inputs.ldap-client = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/ldap-client.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/ldap-client.git?ref=uni2work";
     flake = false;
   };
   inputs.serversession = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/serversession.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/serversession.git?ref=uni2work";
     flake = false;
   };
   inputs.xss-sanitize = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/xss-sanitize.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/xss-sanitize.git?ref=uni2work";
     flake = false;
   };
   inputs.colonnade = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/colonnade.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/colonnade.git?ref=uni2work";
     flake = false;
   };
   inputs.minio-hs = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/minio-hs.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/minio-hs.git?ref=uni2work";
     flake = false;
   };
   inputs.cryptoids = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/cryptoids.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/cryptoids.git?ref=uni2work";
     flake = false;
   };
   inputs.zip-stream = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/zip-stream.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/zip-stream.git?ref=uni2work";
     flake = false;
   };
   inputs.yesod = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/yesod.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/yesod.git?ref=uni2work";
     flake = false;
   };
   inputs.cryptonite = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/cryptonite.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/cryptonite.git?ref=uni2work";
     flake = false;
   };
   inputs.esqueleto = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/esqueleto.git?ref=uni2work";
+    url = "git+https://gitlab.ifi.lmu.de/uni2work/haskell/esqueleto.git?ref=uni2work";
     flake = false;
   };
 
-  inputs.tail-DateTime = {
-    url = "git+ssh://git@gitlab2.rz.ifi.lmu.de/uni2work/tail.DateTime.git?ref=uni2work";
-    flake = false;
-  };
   inputs.fontawesome-token = {
     url = "path:/etc/fontawesome-token";
     flake = false;
diff --git a/shell.nix b/shell.nix
index ee48fe9b2..80b80297b 100644
--- a/shell.nix
+++ b/shell.nix
@@ -77,7 +77,7 @@ in pkgs.mkShell {
   nativeBuildInputs = [develop inDevelop killallUni2work diffRunning]
   ++ (with pkgs;
       [ nodejs-14_x postgresql_12 openldap google-chrome exiftool memcached minio minio-client                        
-        gup skopeo
+        gup skopeo reuse pre-commit
         # busybox # for print services, but interferes with build commands in develop-shell
         htop
         pdftk #pdftk just for testing pdf-passwords