fix: consolidate Docker build into release workflow (#5)

* fix: consolidate Docker build into release workflow

* fix: install diffutils in container for GNU diff color support

Author: xMoelletschi

.github/workflows/release.yml

@@ -21,6 +21,7 @@ jobs:
           go-version: '1.25'
 
       - name: Semantic Release
+        id: semantic
         uses: cycjimmy/semantic-release-action@v4
         with:
           extra_plugins: |
@@ -29,34 +30,30 @@ jobs:
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
-  docker:
-    runs-on: ubuntu-latest
-    needs: release
-    steps:
-      - uses: actions/checkout@v4
-        with:
-          fetch-depth: 0
-
       - name: Set up Docker Buildx
+        if: steps.semantic.outputs.new_release_published == 'true'
         uses: docker/setup-buildx-action@v3
 
       - name: Login to GHCR
+        if: steps.semantic.outputs.new_release_published == 'true'
         uses: docker/login-action@v3
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Docker meta
+        if: steps.semantic.outputs.new_release_published == 'true'
         id: meta
         uses: docker/metadata-action@v5
         with:
           images: ghcr.io/${{ github.repository }}
           tags: |
-            type=semver,pattern={{version}}
+            type=raw,value=${{ steps.semantic.outputs.new_release_version }}
             type=raw,value=latest
 
       - name: Build and push
+        if: steps.semantic.outputs.new_release_published == 'true'
         uses: docker/build-push-action@v6
         with:
           context: .

Dockerfile

@@ -10,7 +10,7 @@ RUN CGO_ENABLED=0 GOOS=linux go build -ldflags="-w -s" -o terraform-gitlab-drift
 
 FROM alpine:3.23.3
 
-RUN apk --no-cache add ca-certificates
+RUN apk --no-cache add ca-certificates diffutils
 
 COPY --from=builder /build/terraform-gitlab-drift /usr/local/bin/terraform-gitlab-drift