ci: Add specific job to build grist image

.github/workflows/grist-tag-and-push.yaml

@@ -0,0 +1,65 @@
+name: Build and push grist image
+
+on:
+  workflow_dispatch:
+    inputs:
+      gristVersion:
+        description: 'Grist base image'
+        required: true
+      dinumTag:
+        description: 'DINUM docker image tag'
+        required: true
+      commitSha:
+        description: 'Git commit sha to build the image'
+        required: true
+
+env:
+  DOCKER_USER: 1001:127
+
+jobs:
+  build-and-push-backend:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        uses: actions/create-github-app-token@v1
+        id: app-token
+        with:
+          app-id: ${{ secrets.APP_ID }}
+          private-key: ${{ secrets.PRIVATE_KEY }}
+          owner: ${{ github.repository_owner }}
+          repositories: "impress,secrets"
+      -
+        name: Checkout repository
+        uses: actions/checkout@v2
+        with:
+          submodules: recursive
+          token: ${{ steps.app-token.outputs.token }}
+          ref: ${{ github.event.inputs.commitSha }}
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: lasuite/grist
+          tags: |
+            type=raw,value=${{ github.event.inputs.dinumTag }}
+      -
+        name: Load sops secrets
+        uses: rouja/actions-sops@main
+        with:
+          secret-file: secrets/numerique-gouv/dockerfiles/secrets.enc.env
+          age-key: ${{ secrets.SOPS_PRIVATE }}
+      -
+        name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        run: echo "$DOCKER_HUB_PASSWORD" | docker login -u "$DOCKER_HUB_USER" --password-stdin
+      -
+        name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: ${{ matrix.path }}
+          file: ${{ matrix.dockerfile }}
+          push: true
+          build-args: GRIST_VERSION=${{ github.event.inputs.gristVersion }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: {{ steps.meta.outputs.labels }}