Split release pipeline into remote and local image builds

Matrix strategy builds both targets in parallel. Tags follow the
pattern: v0.3.0-remote, v0.3.0-local, latest-remote, latest-local.

.github/workflows/release.yml

@@ -1,4 +1,4 @@
-name: Release Docker Image
+name: Release Docker Images
 
 on:
   push:
@@ -11,12 +11,16 @@ env:
 
 jobs:
   release:
-    name: Build & push Docker image
+    name: Build & push — ${{ matrix.target }}
     runs-on: ubuntu-latest
     permissions:
       contents: read
       packages: write
 
+    strategy:
+      matrix:
+        target: [remote, local]
+
     steps:
       - uses: actions/checkout@v4
 
@@ -28,15 +32,15 @@ jobs:
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Extract version from tag
+      - name: Docker metadata
         id: meta
         uses: docker/metadata-action@v5
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: |
-            type=semver,pattern={{version}}
-            type=semver,pattern={{major}}.{{minor}}
-            type=raw,value=latest
+            type=semver,pattern={{version}},suffix=-${{ matrix.target }}
+            type=semver,pattern={{major}}.{{minor}},suffix=-${{ matrix.target }}
+            type=raw,value=latest-${{ matrix.target }}
 
       - name: Extract version from tag
         id: version
@@ -45,6 +49,7 @@ jobs:
       - uses: docker/build-push-action@v6
         with:
           context: .
+          target: ${{ matrix.target }}
           push: true
           platforms: linux/amd64,linux/arm64
           build-args: APP_VERSION=${{ steps.version.outputs.value }}