Update Docker tags

* Keep only branch, pr, and SHA
* Add repo tags vX.Y or vX.Y.Z

Author: edoardob90

.github/workflows/docker-build.yml

@@ -10,6 +10,9 @@ on:
       - slides/**
       - images/**
       - .gitignore
+    tags:
+      - "v*.*"
+      - "v*.*.*"
   pull_request:
     paths-ignore:
       - "*.md"
@@ -51,12 +54,10 @@ jobs:
         with:
           images: ghcr.io/${{ github.repository }}
           tags: |
-            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' && matrix.arch == 'amd64' }}
-            type=ref,event=branch
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
             type=ref,event=pr
+            type=ref,event=tag
             type=sha,format=short
-          flavor: |
-            suffix=-${{ matrix.arch }}
 
       - name: Build and push
         uses: docker/build-push-action@v6