fix: add manual release fallback

Allow an exact image version and latest-tag update to be dispatched for a release tag when GitHub does not emit the expected tag-push workflow run.

Author: OleRoss

.github/workflows/docker_standalone_triggered_by_tag_push.yml

@@ -1,6 +1,17 @@
 name: Release standalone image
 
 on:
+  workflow_dispatch:
+    inputs:
+      version:
+        description: Docker image version without the v prefix
+        required: true
+        type: string
+      publish_latest:
+        description: Also update the latest tag
+        required: true
+        default: false
+        type: boolean
   push:
     tags:
       - 'v*'
@@ -60,8 +71,9 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
-            type=semver,pattern={{version}}
-            type=raw,value=latest
+            type=semver,pattern={{version}},enable=${{ github.event_name == 'push' }}
+            type=raw,value=${{ inputs.version }},enable=${{ github.event_name == 'workflow_dispatch' }}
+            type=raw,value=latest,enable=${{ github.event_name == 'push' || inputs.publish_latest }}
             type=sha,prefix=sha-
 
       - name: Build and publish standalone image