chore(gitlab-ci): add backend jobs

.gitlab-ci.yml

@@ -107,6 +107,67 @@ push frontend image:
     # - docker image tag 
     - docker push frontend
 
+backend image:
+  stage: build images
+  script:
+  # TODO: define make target for this?
+    - make -- --docker-build-backend-build FRADRIVE_SERVICE=backend
+    - docker image save backend | gzip > docker/backend/image.tar.gz
+  artifacts:
+    paths:
+      - docker/backend/image.tar.gz
+
+backend build:
+  stage: compile
+  needs:
+    - job: backend image
+      artifacts: true
+    - job: frontend build
+      artifacts: true
+  script:
+    - &load-backend-image zcat docker/backend/image.tar.gz | docker image load
+    - make -- --docker-run-backend-build FRADRIVE_SERVICE=backend
+  artifacts:
+    paths:
+      - /fradrive/.stack/
+      - /fradrive/.stack-work/
+
+backend lint:
+  stage: lint
+  needs:
+    - job: backend image
+      artifacts: true
+  script:
+    - *load-backend-image
+    - make -- --docker-run-backend-lint FRADRIVE_SERVICE=backend
+  cache: *backend-cache
+
+backend test:
+  stage: test
+  needs:
+    - job: backend image
+      artifacts: true
+    - job: backend build
+      artifacts: true
+  script:
+    - *load-backend-image
+    - make -- --docker-run-backend-test FRADRIVE_SERVICE=backend
+
+  cache: *backend-cache
+
+push backend image:
+  stage: push images
+  needs:
+    - job: backend image
+      artifacts: true
+    - job: backend build
+      artifacts: false
+    - job: backend test
+      artifacts: false
+  script:
+    - *load-backend-image
+    - docker push backend
+
 # frontend dependencies:
 #   stage: setup
 #   cache: