ci: build an edge (master-branch) image too

.github/workflows/publish-docker.yml

@@ -4,6 +4,10 @@ on:
   release:
     types: [published]
 
+  push:
+    branches:
+      - master
+
 jobs:
   publish:
     runs-on: ubuntu-latest
@@ -12,26 +16,52 @@ jobs:
       contents: read
     steps:
       - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
+
+      - name: Set up master (edge) image metadata
+        id: meta-master
+        uses: docker/metadata-action@v5
+        if: ${{ github.event_name != 'release' }}
         with:
-          python-version: '3.11'
-      - run: pip install poetry && poetry update && poetry export -f requirements.txt > requirements.txt
-      - uses: docker/metadata-action@v5
-        id: meta
+          images: |
+            ${{ inputs.image-name }}
+          flavor: |
+            latest=false
+          tags: |
+            type=raw,value=master,enable={{is_default_branch}}
+            type=sha,prefix=sha-
+
+      - name: Set up release image metadata
+        id: meta-release
+        uses: docker/metadata-action@v5
+        if: ${{ github.event_name == 'release' }}
         with:
           images: ghcr.io/idoneam/Canary
+          flavor: |
+            latest=true
           tags: |
             type=semver,pattern={{major}}
             type=semver,pattern={{major}}.{{minor}}
             type=semver,pattern={{version}}
+
       - uses: docker/setup-buildx-action@v3
+
       - uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push master (edge) image
+        uses: docker/build-push-action@v6
+        if: ${{ github.event_name != 'release' }}
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta-master.outputs.tags }}
+
       - uses: docker/build-push-action@v6
+        if: ${{ github.event_name == 'release' }}
         with:
           context: .
           push: true
-          tags: ${{ steps.meta.outputs.tags }}
+          tags: ${{ steps.meta-release.outputs.tags }}