ci: configure release actions

This update includes:
- tagged docker image release
- auto-sync of README with description in docker hub
- auto-creation of draft GitHub release on tag push

.github/workflows/antmarky.yml

@@ -76,10 +76,24 @@ jobs:
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
 
+  generate-release:
+    name: 📦 Generate GitHub Release
+    if: startsWith(github.ref, 'refs/tags/v')
+    needs: generate-docs
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+
+      - name: Create a GitHub release
+        uses: softprops/action-gh-release@v1
+        with:
+          body: 'This release was generated automatically. Full details will be available soon'
+          draft: true
+
   build-docker-image:
     name: 🐋 Build and push Docker image
     needs: generate-docs
-    if: github.ref == 'refs/heads/main'
+    if: startsWith(github.ref, 'refs/tags/v')
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
@@ -90,8 +104,9 @@ jobs:
         with:
           images: bandantonio/antmarky
           tags: |
-            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}
-      
+            type=semver,pattern={{version}}
+            type=raw,value=latest,enable=${{ github.ref == format('refs/heads/{0}', 'main') }}
+
       - name: 🔑 Login to Docker Hub
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v1
@@ -105,4 +120,12 @@ jobs:
           context: .
           push: ${{ github.event_name != 'pull_request' }}
           tags: ${{ steps.docker_meta.outputs.tags }}
-          labels: ${{ steps.docker_meta.outputs.labels }}
+          labels: ${{ steps.docker_meta.outputs.labels }}
+
+      - name: 🐋 📝 DockerHub description
+        uses: peter-evans/dockerhub-description@v3
+        with:
+          username: ${{ secrets.DOCKER_HUB_USER }}
+          password: ${{ secrets.DOCKER_HUB_ALT_TOKEN }}
+          repository: bandantonio/antmarky
+          short-description: ${{ github.event.repository.description }}