Add CI workflow with markdown linting and self-hosted runner job

.gitea/workflows/ci.yml

@@ -0,0 +1,44 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+
+jobs:
+  lint-and-test:
+    runs-on: ubuntu-latest
+    container:
+      image: node:20-bullseye
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint markdown
+        run: npm run test:markdown
+
+      - name: Check markdown links
+        run: npm run test:links
+
+  build-and-test:
+    runs-on: self-hosted
+    container:
+      image: node:20-bullseye
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v4
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Lint
+        run: npm run lint
+
+      - name: Test
+        run: npm test
+
+      - name: Check formatting
+        run: npm run lint:format

package.json

@@ -5,7 +5,10 @@
   "private": true,
   "scripts": {
     "test:markdown": "markdownlint-cli2 README.md 'docs/**/*.md'",
-    "test:links": "markdown-link-check README.md docs/**/*.md"
+    "test:links": "markdown-link-check README.md docs/**/*.md",
+    "lint": "markdownlint-cli2 README.md 'docs/**/*.md'",
+    "test": "npm run test:markdown && npm run test:links",
+    "lint:format": "markdownlint-cli2 --fix README.md 'docs/**/*.md'"
   },
   "devDependencies": {
     "markdown-link-check": "^3.13.7",