Fix deploy

.github/workflows/build_deploy.yml

@@ -12,6 +12,24 @@ env:
 
 jobs:
 
+  config:
+    runs-on: ubuntu-latest
+    outputs:
+      BASE_TAG: ${{ steps.vars.outputs.BASE_TAG }}
+      VOLTO_VERSION: ${{ steps.vars.outputs.VOLTO_VERSION }}
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Compute several vars needed for the build
+        id: vars
+        run: |
+          echo 'BASE_TAG=sha-$(git rev-parse --short HEAD)' >> $GITHUB_OUTPUT
+          python3 -c 'import json; data = json.load(open("./mrs.developer.json")); print("VOLTO_VERSION=" + (data["core"].get("tag") or "latest"))' >> $GITHUB_OUTPUT
+      - name: Test vars
+        run: |
+          echo 'BASE_TAG=${{ steps.vars.outputs.BASE_TAG }}'
+          echo 'VOLTO_VERSION=${{ steps.vars.outputs.VOLTO_VERSION }}'
+
   backend-black:
     if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name
     runs-on: ubuntu-latest
@@ -453,6 +471,7 @@ jobs:
     if: github.event_name != 'pull_request' || github.event.pull_request.head.repo.full_name != github.event.pull_request.base.repo.full_name
     runs-on: ubuntu-latest
     needs:
+      - config
       - backend-black
       - backend-flake8
       - backend-isort
@@ -530,7 +549,9 @@ jobs:
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}
-          build-args: SEED=$GITHUB_RUN_ID
+          build-args: |
+            SEED=$GITHUB_RUN_ID
+            VOLTO_VERSION=${{ needs.config.outputs.VOLTO_VERSION }}
 
   deploy:
     runs-on: ubuntu-latest