chore: use golangci lint

.github/workflows/golangci-lint.yml

@@ -0,0 +1,41 @@
+# Copyright The ORAS Authors.
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+name: golangci-lint
+
+on:
+  pull_request:
+    paths-ignore:
+      - 'docs/**'
+
+permissions:
+  contents: read
+
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        go-version: ['1.20']
+      fail-fast: true
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Setup Go ${{ matrix.go-version }}
+      uses: actions/setup-go@v4
+      with:
+        go-version: ${{ matrix.go-version }}
+        check-latest: true
+    - name: golangci-lint
+      uses: golangci/golangci-lint-action@v3