feat(ci): auto upload to ghcr and release artifact

.github/workflows/build.yml

@@ -5,6 +5,8 @@ on:
     branches:
       - master
   pull_request:
+  release:
+    types: [published]
 
 jobs:
   build:
@@ -55,3 +57,36 @@ jobs:
       with:
         name: tslink-dev${{ steps.date.outputs.date }}-${{ matrix.goos }}_${{ matrix.goarch }}
         path: release/
+
+  container:
+    if: github.event_name == 'release'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+    - uses: actions/checkout@v6
+
+    - name: Set up Go
+      uses: actions/setup-go@v6
+      with:
+        go-version: '1.26.3'
+        cache: true
+
+    - name: Login to ghcr.io
+      uses: docker/login-action@v3
+      with:
+        registry: ghcr.io
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+
+    - name: Install ko
+      run: go install github.com/google/ko@latest
+
+    - name: Build and push container image
+      env:
+        KO_DOCKER_REPO: ghcr.io/${{ github.repository_owner }}/tslink
+      run: |
+        ko build --bare ./ --platform=all \
+          -t latest \
+          -t ${{ github.ref_name }}