Add CI file

.gitlab-ci.yml

+image: adinapoli/gargantext:v3.5
+
+variables:
+  STACK_ROOT: "${CI_PROJECT_DIR}/.stack-root"
+  STACK_OPTS: "--system-ghc"
+  STORE_DIR: "${CI_PROJECT_DIR}/.cabal"
+  CORENLP: "4.5.4"
+  FF_USE_FASTZIP: "true"
+  ARTIFACT_COMPRESSION_LEVEL: "fast"
+  CACHE_COMPRESSION_LEVEL: "fast"
+
+stages:
+  - cabal
+  - test
+
+cabal:
+  stage: cabal
+  cache:
+    key: cabal.project
+    paths:
+      - dist-newstyle/
+      - .cabal/
+    policy: pull-push
+  script:
+    - nix-shell --run "./bin/update-project-dependencies $STORE_DIR && cabal --store-dir=$STORE_DIR v2-build all --ghc-options='-O0'"
+  allow_failure: false
+
+test:
+  stage: test
+  cache:
+    key: cabal.project
+    paths:
+      - dist-newstyle/
+      - .cabal/
+    policy: pull-push
+  script:
+    - |
+      nix-shell --run "cd /builds/gargantext/haskell-gargantext; $CABAL --store-dir=$STORE_DIR v2-test --test-show-details=streaming --ghc-options='-O0'\""