test(docs, lint): add markdown lint check to docs CI workflow (#5303)

Author: DoctorJohn

.github/workflows/docs.yml

@@ -16,6 +16,28 @@ jobs:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 1
+      - uses: actions/setup-node@v2
+        with:
+          node-version: 14
+      - name: Get yarn cache directory path
+        id: yarn-cache-dir-path
+        run: echo "::set-output name=dir::$(yarn cache dir)"
+      - uses: actions/cache@v2
+        name: Yarn Cache
+        id: yarn-cache
+        with:
+          path: ${{ steps.yarn-cache-dir-path.outputs.dir }}
+          key: ${{ runner.os }}-yarn-v1-${{ hashFiles('**/package.json') }}
+          restore-keys: ${{ runner.os }}-yarn-v1
+      - name: Yarn Install
+        uses: nick-invision/retry@v2
+        with:
+          timeout_minutes: 3
+          retry_wait_seconds: 30
+          max_attempts: 3
+          command: yarn --no-audit --prefer-offline
+      - name: Lint
+        run: yarn lint:markdown
       - name: Install Dependencies
         uses: nick-invision/retry@v2
         with:

package.json

@@ -7,10 +7,11 @@
     "build:all:clean": "lerna run build:clean",
     "build:all:build": "lerna run build",
     "lint": "eslint . --ext .js,.jsx,.ts,.tsx",
+    "lint:markdown": "prettier --check \"docs/**/*.md\"",
     "lint:report": "eslint --output-file=eslint-report.json --format=json . --ext .js,.jsx,.ts,.tsx",
     "lint:spellcheck": "spellchecker --quiet --files=\"docs/**/*.md\" --dictionaries=\"./.spellcheck.dict.txt\" --reports=\"spelling.json\" --plugins spell indefinite-article repeated-words syntax-mentions syntax-urls frontmatter",
     "tsc:compile": "tsc --project .",
-    "lint:all": "yarn lint && yarn lint:spellcheck && yarn tsc:compile",
+    "lint:all": "yarn lint && yarn lint:markdown && yarn lint:spellcheck && yarn tsc:compile",
     "lerna:bootstrap": "lerna bootstrap",
     "lerna:link": "lerna link",
     "lerna:clean": "lerna clean",