ci(github): publish docker image

.github/workflows/publish.yml

@@ -0,0 +1,53 @@
+#
+
+name: Publish
+
+on:
+  push:
+    branches:
+      - main
+      - alpha
+
+  workflow_dispatch:
+
+permissions:
+  packages: write
+
+jobs:
+  build:
+    name: Publich Docker Image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Github Container Registry
+        uses: docker/login-action@v2
+        with:
+          registry: ghcr.io
+          username: ${{ github.repository_owner }}
+          password: ${{ github.token }}
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/betagouv/espace-partenaire
+          tags: |
+            type=sha,format=long,prefix=
+            type=ref,event=branch
+            type=ref,event=tag
+          flavor: |
+            latest=${{ github.ref == 'refs/heads/main' }}
+
+      - name: Build image
+        uses: docker/build-push-action@v3
+        with:
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          platforms: linux/amd64
+          cache-from: type=registry,ref=ghcr.io/${{ github.repository }}:buildcache
+          cache-to: type=registry,ref=ghcr.io/${{ github.repository }}:buildcache,mode=max
+          build-args: |
+            SOURCE_COMMIT=${{ github.sha }}