diff --git a/gitlab-ci.yml b/gitlab-ci.yml
new file mode 100644
index 0000000..0ed5d1c
--- /dev/null
+++ b/gitlab-ci.yml
@@ -0,0 +1,52 @@
+stages:
+  - check
+  - build
+  - deploy
+
+variables:
+  APP_REPO: "https://github.com/barais/doodlestudent.git"
+  SUBMODULE_PATH: "app"
+
+check_app_update:
+  stage: check
+  image: alpine:latest
+  before_script:
+    - apk add --no-cache git
+  script:
+    # Récupère le dernier commit distant
+    - LATEST_REMOTE=$(git ls-remote $APP_REPO HEAD | awk '{print $1}')
+    # Récupère le commit actuel du submodule
+    - CURRENT_SUBMODULE=$(git rev-parse HEAD:$SUBMODULE_PATH || echo "none")
+    - echo "Remote: $LATEST_REMOTE"
+    - echo "Current: $CURRENT_SUBMODULE"
+
+    # Compare
+    - |
+      if [ "$LATEST_REMOTE" != "$CURRENT_SUBMODULE" ]; then
+        echo "NEW_COMMIT=true" >> variables.env
+      else
+        echo "NEW_COMMIT=false" >> variables.env
+      fi
+  artifacts:
+    reports:
+      dotenv: variables.env
+
+build_image:
+  stage: build
+  image: docker:latest
+  services:
+    - docker:dind
+  rules:
+    - if: '$NEW_COMMIT == "true"'
+  script:
+    - git submodule update --init --remote
+    - docker build -t myapp:latest .
+    - docker push myapp:latest
+
+deploy:
+  stage: deploy
+  rules:
+    - if: '$NEW_COMMIT == "true"'
+  script:
+    - echo "Deploying..."
+    - docker compose up -f dockercompose/docker-compose.yml -d
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