add linter

.github/workflows/linter.yaml

@@ -0,0 +1,19 @@
+name: Linter
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  super-linter:
+    name: Super-Linter
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout Code
+        uses: actions/checkout@v2
+      - name: Super-Linter
+        uses: docker://github/super-linter:v3
+        env:
+          VALIDATE_ALL_CODEBASE: false
+          DEFAULT_BRANCH: master