Tag docker container as latest accordingly to the version (#4241)

* Tag latest release

* Tag latest release

* Code review

* Push latest and version tag

.changeset/sour-sheep-rush.md

@@ -0,0 +1,5 @@
+---
+"saleor-dashboard": patch
+---
+
+Tag docker container as latest when the published GitHub release is marked as "latest"

.github/workflows/publish-containers.yml

@@ -26,12 +26,21 @@ jobs:
       # Pre-releases, alphas, etc. as :snapshot
       - name: Output image tags from git tag events
         if: ${{ startsWith(github.ref, 'refs/tags/') }}
+        env:
+          GH_TOKEN: ${{ github.token }}
         run: |
-          # Remove everything else than the tagged version
-          DASHBOARD_VERSION=${GITHUB_REF#refs/tags/}
+          LATEST_VERSION=$(gh api repos/saleor/saleor-dashboard/releases/latest | jq -r .tag_name)
+          CURRENT_TAG=${GITHUB_REF#refs/tags/}
+
+          if [ "$LATEST_VERSION" = "$CURRENT_TAG" ]; then
+            TAGS=${{ steps.image.outputs.image_name }}:${CURRENT_TAG},${{ steps.image.outputs.image_name }}:latest
+          else
+            TAGS=${{ steps.image.outputs.image_name }}:${CURRENT_TAG}
+          fi
+
           echo "
-          DASHBOARD_VERSION=${DASHBOARD_VERSION}
-          CONTAINER_TAGS=${{ steps.image.outputs.image_name }}:${DASHBOARD_VERSION}
+          DASHBOARD_VERSION=${CURRENT_TAG}
+          CONTAINER_TAGS=${TAGS}
           " >> "${GITHUB_ENV}"
 
       - name: Set up Docker QEMU