feat: add GHCR Docker image build to release workflow

Author: ppiankov

.github/workflows/release.yml

@@ -13,6 +13,7 @@ on:
 
 permissions:
   contents: write
+  packages: write
 
 jobs:
   test:
@@ -140,3 +141,53 @@ jobs:
           body: ${{ steps.notes.outputs.notes }}
           files: dist/*
           generate_release_notes: false
+
+  docker-image:
+    name: Docker image
+    needs: test
+    runs-on: ubuntu-latest
+    steps:
+      - name: Resolve tag
+        id: tag
+        run: |
+          if [ "${{ github.event_name }}" = "workflow_dispatch" ]; then
+            echo "version=${{ github.event.inputs.tag }}" >> $GITHUB_OUTPUT
+          else
+            echo "version=${GITHUB_REF_NAME}" >> $GITHUB_OUTPUT
+          fi
+
+      - uses: actions/checkout@v4
+        with:
+          ref: ${{ steps.tag.outputs.version }}
+
+      - uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GHCR
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          platforms: linux/amd64,linux/arm64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
+          build-args: |
+            VERSION=${{ steps.tag.outputs.version }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.23-alpine AS builder
+FROM golang:1.25-alpine AS builder
 
 WORKDIR /app