MEDIUM: add golangci-lint to CI, use published check-commit image, Dockerfile optimized

Author: aiharos

.github/workflows/main.yml

@@ -8,16 +8,25 @@ on: [ push, pull_request, workflow_dispatch ]
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
   # This workflow contains a single job called "build"
-  build:
-    # The type of runner that the job will run on
+  check-commit:
+    name: check-commit
     runs-on: ubuntu-latest
-
-    # Steps represent a sequence of tasks that will be executed as part of the job
     steps:
       # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0
 
       - name: check-commit
-        uses: docker://aiharos/check-commit:latest
+        uses: docker://haproxytech/check-commit:latest
+
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          working-directory: check-commit