diff --git a/Makefile b/Makefile
index a105940f6..cd008f20f 100644
--- a/Makefile
+++ b/Makefile
@@ -39,6 +39,7 @@ export STACK_CORES = $(shell echo $(($(CPU_CORES)/2)))
 export BASE_PORTS
 export UNIWORXDB_OPTS ?= -cf
 export PROD ?= false
+export SRC
 
 ifneq ($(PROD),true)
   export --DEVELOPMENT=--flag uniworx:dev
@@ -245,6 +246,7 @@ endif
 	  --env CONTAINER_FILE=$(CONTAINER_FILE) \
 	  --env CONTAINER_NAME=$${CONTAINER_NAME} \
 	  --env JOB=$(JOB) \
+	  --env SRC=$(SRC) \
 	  --name $${CONTAINER_NAME} \
 	  $${CONTAINER_CMD} \
 	` ; \
@@ -253,11 +255,13 @@ endif
 	  $(CONTAINER_COMMAND) attach $${CONTAINER_ID} || : ; \
 	fi
 
+# For Reverse Proxy Problem see: https://groups.google.com/g/yesodweb/c/2EO53kSOuy0/m/Lw6tq2VYat4J
+
 # HELP(start-backend): start development instance
 --start-backend:
 	export DEV_PORT_HTTP=`cat $(CONTAINER_FILE) | grep 'DEV_PORT_HTTP=' | sed 's/DEV_PORT_HTTP=//'`; \
 	export DEV_PORT_HTTPS=`cat $(CONTAINER_FILE) | grep 'DEV_PORT_HTTPS=' | sed 's/DEV_PORT_HTTPS=//'`; \
-	export HOST=`hostname -s` ; \
+	export HOST=127.0.0.1 ; \
 	export PORT=$${PORT:-$${DEV_PORT_HTTP}} ; \
 	export DETAILED_LOGGING=$${DETAILED_LOGGING:-true} ; \
 	export LOG_ALL=$${LOG_ALL:-false} ; \
@@ -271,7 +275,7 @@ endif
 	export RIBBON=$${RIBBON:-$${HOST:-localhost}} ; \
 	export APPROOT=$${APPROOT:-http://localhost:$${DEV_PORT_HTTP}} ; \
 	export AVSPASS=$${AVSPASS:-nopasswordset} ; \
-	stack $(STACK_CORES) exec --local-bin-path $$(pwd)/bin --copy-bins -- yesod devel -p "$${DEV_PORT_HTTP}" -q "$${DEV_PORT_HTTPS}"
+	stack $(STACK_CORES) exec --local-bin-path $$(pwd)/bin --copy-bins -- yesod devel -n -p "$${DEV_PORT_HTTP}" -q "$${DEV_PORT_HTTPS}"
 # HELP(compile-backend): compile backend binaries
 --compile-backend:
 	stack build $(STACK_CORES) --fast --profile --library-profiling --executable-profiling --flag uniworx:-library-only $(--DEVELOPMENT) --local-bin-path $$(pwd)/bin --copy-bins
@@ -293,7 +297,7 @@ uniworx.cabal:
 --start-frontend: --compile-frontend;
 --dependencies-frontend: node_modules assets static well-known;
 node_modules: package.json package-lock.json
-	npm ci --cache .npm --prefer-offline
+	npm install --cache .npm --prefer-offline
 package-lock.json: package.json
 	npm install --cache .npm --prefer-offline
 assets: assets/favicons assets/icons;
@@ -315,7 +319,7 @@ well-known: static;
 	./bin/uniworxdb $(UNIWORXDB_OPTS)
 
 --shell-ghci:
-	stack exec -- ghci
+	stack ghci -- $(SRC)
 # --main-is uniworx:exe:uniworx
 
 # HELP(shell-{backend,frontend,memcached,minio,postgres}): enter (bash) shell inside a new container of a given service
diff --git a/azure-pipelines.yaml b/azure-pipelines.yaml
index 7da1e371e..581e555da 100644
--- a/azure-pipelines.yaml
+++ b/azure-pipelines.yaml
@@ -16,18 +16,31 @@ jobs:
 #       echo Add other tasks to build, test, and deploy your project.
 #       echo See https://aka.ms/yaml
 #     displayName: 'Run a multi-line script'
-# - job: DockerTaskTest
-#   container:
-#     image: 'devfra.azurecr.io/de.fraport.trusted/ubuntu:22.04'
-#     endpoint: devfra
-#   steps:
-#     - task: Docker@2
-#       displayName: Image build test
-#       inputs:
-#         command: buildAndPush
-#         Dockerfile: docker/backend/Dockerfile
-#         buildContext: .
-#         tags: backend
+- job: DockerTaskTest
+  container:
+    image: devfra.azurecr.io/de.fraport.build/tools:1.1.0
+    endpoint: devfra
+  steps:
+    - task: Docker@2
+      name: dockerLoginDevFra
+      displayName: Docker Login to devfra
+      inputs:
+        command: login
+        containerRegistry: devFra
+    - task: Docker@2
+      name: dockerBuild
+      displayName: Backend image build test
+      inputs:
+        command: build
+        Dockerfile: docker/backend/Dockerfile
+        buildContext: .
+        tags: |
+          $(Build.BuildNumber)
+          backend
+        arguments: |
+          --build-arg HTTPS_PROXY=http://proxy.frankfurt-airport.de:8080
+          --build-arg HTTP_PROXY=http://proxy.frankfurt-airport.de:8080
+          --build-arg NO_PROXY='localhost,127.0.0.1,*.docker.internal,*.azmk8s.io,devfra.azurecr.io,devfra.westeurope.data.azurecr.io'
 # - job: BuildKitTest
 #   container:
 #     image: 'devfra.azurecr.io/de.fraport.trusted/buildkit:0.12.1'
@@ -38,15 +51,15 @@ jobs:
 #         --local context=. \
 #         --local dockerfile=docker/backend/Dockerfile
 #       displayName: BuildKit test
-- job: CustomBuildahTest
-  container:
-    image: 'devfra.azurecr.io/de.fraport.trusted/ubuntu:22.04'
-    endpoint: devfra
-  steps:
-    - script: |
-        id
-        docker build --help
-        sudo apt-get -y update
-        sudo apt-get -y install buildah
-        buildah bud -t fradrive-backend-test --volume .:/mnt/fradrive --file docker/backend/Dockerfile
-      displayName: Build buildah image
\ No newline at end of file
+# - job: CustomBuildahTest
+#   container:
+#     image: 'devfra.azurecr.io/de.fraport.trusted/ubuntu:22.04'
+#     endpoint: devfra
+#   steps:
+#     - script: |
+#         id
+#         docker build --help
+#         sudo apt-get -y update
+#         sudo apt-get -y install buildah
+#         buildah bud -t fradrive-backend-test --volume .:/mnt/fradrive --file docker/backend/Dockerfile
+#       displayName: Build buildah image
\ No newline at end of file
diff --git a/docker/backend/Dockerfile b/docker/backend/Dockerfile
index 54a0c5d55..e2629549c 100644
--- a/docker/backend/Dockerfile
+++ b/docker/backend/Dockerfile
@@ -1,6 +1,12 @@
-FROM debian:12.5
+FROM docker.io/ubuntu:latest
 
-RUN apt-get update && apt-get -y install inotify-tools
+# debug info
+# RUN lsb_release -a
+# RUN curl -k https://google.de
+RUN env
+# RUN curl -sSLk -x $HTTP_PROXY
+
+RUN apt-get -y update && apt-get -y install inotify-tools
 RUN apt-get -y update && apt-get -y install haskell-stack git
 RUN apt-get -y update && apt-get -y install alex g++ happy libghc-zlib-dev libpq-dev libsodium-dev locales locales-all pkg-config
 RUN apt-get -y update && apt-get -y install llvm
@@ -26,7 +32,7 @@ RUN stack install yesod-bin
 RUN stack install hpack
 
 ENV FRADRIVE_MAKE_TARGET=--start-backend
-ENTRYPOINT make -- ${FRADRIVE_MAKE_TARGET} STACK_ROOT="${STACK_ROOT}" IN_CONTAINER=true CONTAINER_FILE="${CONTAINER_FILE}" JOB="${JOB}"
+ENTRYPOINT make -- ${FRADRIVE_MAKE_TARGET} STACK_ROOT="${STACK_ROOT}" IN_CONTAINER=true CONTAINER_FILE="${CONTAINER_FILE}" JOB="${JOB}" SRC="${SRC}"
 
 EXPOSE 3000/tcp
 EXPOSE 3443/tcp
diff --git a/src/Utils/Icon.hs b/src/Utils/Icon.hs
index b09ca6912..4cffa0640 100644
--- a/src/Utils/Icon.hs
+++ b/src/Utils/Icon.hs
@@ -37,7 +37,11 @@ type WidgetSiteless = forall site. WidgetFor site ()
 
 
 ---------------------------------------------------------------------------
--- IMPORTANT: Alert-Icons must be registered in alert-icons.js as well!!!
+-- IMPORTANT:
+-- All icons must be manually registered within the following files:
+--  - src/Utils/Icon.hs
+--  - assets/icon-src/fontawesome.json
+--  - frontend/src/icons.scss
 ---------------------------------------------------------------------------
 data Icon
   = IconNew
@@ -136,8 +140,7 @@ data Icon
   | IconUserBadge         -- something about user-avs, e.g. badge in-/valid
   | IconGlasses           -- user must wear glasses while driving
   deriving (Eq, Ord, Enum, Bounded, Show, Read, Generic)
-  deriving anyclass (Universe, Finite, NFData)
-
+    deriving anyclass (Universe, Finite, NFData)
 
 iconText :: Icon -> Text
 iconText = camelToPathPiece' 1 . tshow
@@ -201,32 +204,32 @@ iconShortcuts = foldMap mkIcon (universeF :: [Icon])
 -- Some case are special, hence no Template Haskell here
 
 isVisible :: Bool -> Markup
--- ^ Display an icon that denotes that something™ is visible or invisible
+-- ^ Display an icon that denotes that somethingâ„¢ is visible or invisible
 isVisible True  = icon IconVisible
 isVisible False = icon IconInvisible
 
 hasComment :: Bool -> Markup
--- ^ Display an icon that denotes that something™ has a comment or not
+-- ^ Display an icon that denotes that somethingâ„¢ has a comment or not
 hasComment True  = icon IconCommentTrue
 hasComment False = icon IconCommentFalse
 
 hasTickmark :: Bool -> Markup
--- ^ Maybe display an icon that denotes that something™ is okay
+-- ^ Maybe display an icon that denotes that somethingâ„¢ is okay
 hasTickmark True  = icon IconOK
 hasTickmark False = mempty
 
 isBad :: Bool -> Markup
--- ^ Maybe display an icon that denotes that something™ is bad
+-- ^ Maybe display an icon that denotes that somethingâ„¢ is bad
 isBad True  = icon IconProblem
 isBad False = mempty
 
--- ^ Maybe display an icon that denotes that something™ is new
+-- ^ Maybe display an icon that denotes that somethingâ„¢ is new
 isNew :: Bool -> Markup
 isNew True  = icon IconNew
 isNew False = mempty
 
 -- DEPRECATED by Handler.Utils.updateAutomatic, which includes a helpful tooltip
--- Maybe display an icon that denotes that something™ is NOT automagically updated or derived, but had been edited
+-- Maybe display an icon that denotes that somethingâ„¢ is NOT automagically updated or derived, but had been edited
 -- isAutomatic :: Bool -> Markup
 -- isAutomatic True  = mempty          -- icon IconMagic
 -- isAutomatic False = icon IconLocked -- IconEdit
@@ -262,9 +265,9 @@ iconWriteReadOnly False = icon IconVisible
 -- we implement them here just once for the first icon:
 --
 isVisibleWidget :: Bool -> WidgetSiteless
--- ^ Widget having an icon that denotes that something™ is visible or invisible
+-- ^ Widget having an icon that denotes that somethingâ„¢ is visible or invisible
 isVisibleWidget = toWidget . isVisible
 
 maybeIsVisibleWidget :: Maybe Bool -> WidgetSiteless
--- ^ Maybe a widget with an icon that denotes that something™ is visible or invisible
+-- ^ Maybe a widget with an icon that denotes that somethingâ„¢ is visible or invisible
 maybeIsVisibleWidget = toWidget . foldMap isVisible