Add CI workflow

.gitea/workflows/docker-build.yml

@@ -0,0 +1,39 @@
+name: Build & Push Docker Image with Commit Hash Tag
+
+on:
+  push:
+    branches:
+      - master
+  workflow_dispatch:
+
+jobs:
+  build-and-push:
+    runs-on: docker
+
+    steps:
+      - name: 📦 Cloner le dépôt
+        uses: actions/checkout@v3
+
+      - name: ⚙️ Récupérer le hash court du commit
+        id: vars
+        run: echo "COMMIT_HASH=$(git rev-parse --short HEAD)" >> $GITEA_OUTPUT
+
+      - name: 🔐 Connexion au registre Docker (Gitea)
+        uses: docker/login-action@v3
+        with:
+          registry: ${{ vars.REGISTRY_URL }}
+          username: ${{ secrets.REGISTRY_USERNAME }}
+          password: ${{ secrets.REGISTRY_PASSWORD }}
+
+      - name: ⚙️ Préparer Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: 🐳 Construire & pousser l’image avec Buildx
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: |
+            ${{ vars.REGISTRY_URL }}/${{ vars.REGISTRY_REPOSITORY }}:latest
+            ${{ vars.REGISTRY_URL }}/${{ vars.REGISTRY_REPOSITORY }}:${{ steps.vars.outputs.COMMIT_HASH }}
+          platforms: linux/amd64