New GitHub Action to lint code style

.github/workflows/lint-code.yml

@@ -0,0 +1,53 @@
+name: Lint Code
+on: [push, pull_request]
+
+jobs:
+  Markdown:
+    name: Test Markdown syntax
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '10'
+
+      - name: Install markdownlint
+        run: npm install -g markdownlint-cli
+
+      - name: Run Markdownlint
+        run: markdownlint ${GITHUB_WORKSPACE} -c ${GITHUB_WORKSPACE}/.github/markdownlint.yml
+
+  EditorConfig:
+    name: Test Editor Config rules
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-node@v1
+        with:
+          node-version: '10'
+
+      - name: Install ECLint
+        run: npm install -g eclint
+
+      - name: Run ECLint check
+        run: eclint check $(git ls-files | grep -v test)
+
+  YAML:
+    name: Test YAML syntax
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v1
+
+      - name: Install NodeJS
+        uses: actions/setup-node@v1
+        with:
+          node-version: '10'
+
+      - name: Install yaml-lint
+        run: npm install -g yaml-lint
+
+      - name: Run yaml-lint
+        run: yamllint $(find ${GITHUB_WORKSPACE} -type f -name "*.yaml" -or -name "*.yml")