Add pa11y-ci for accessibility testing.

Use pa11y-ci-reporter-html and also upload the HTML results to CI if there are any failures

package.json

@@ -61,8 +61,11 @@
     "docs-spellcheck": "cspell \"site/**/*.md\" --no-progress",
     "docs-vnu": "node build/vnu-jar.js",
     "docs-lint": "npm-run-all --aggregate-output --parallel docs-vnu docs-linkinator docs-spellcheck",
+    "docs-pa11y": "delay 3 && pa11y-ci --config build/.pa11yci.json --sitemap http://localhost:9001/sitemap.xml --sitemap-find https://getbootstrap.com --sitemap-replace http://localhost:9001 --json > pa11y-ci-results.json",
+    "docs-pa11y-html": "pa11y-ci-reporter-html",
+    "docs-accessibility": "npm-run-all --parallel --race docs-serve-only docs-pa11y",
     "docs-serve": "hugo server --port 9001 --disableFastRender",
-    "docs-serve-only": "npx sirv-cli _site --port 9001",
+    "docs-serve-only": "sirv _site --no-clear --port 9001",
     "lockfile-lint": "lockfile-lint --allowed-hosts npm --allowed-schemes https: --empty-hostname false --type npm --path package-lock.json",
     "update-deps": "ncu -u -x globby,karma-browserstack-launcher,stylelint && echo Manually update site/assets/js/vendor",
     "release": "npm-run-all dist release-sri docs-build release-zip*",
@@ -113,6 +116,7 @@
     "clean-css-cli": "^5.4.2",
     "cross-env": "^7.0.3",
     "cspell": "^5.13.1",
+    "delay-cli": "^1.1.0",
     "eslint": "^8.3.0",
     "eslint-config-xo": "^0.39.0",
     "eslint-plugin-import": "^2.25.3",
@@ -137,6 +141,8 @@
     "lockfile-lint": "^4.6.2",
     "nodemon": "^2.0.15",
     "npm-run-all": "^4.1.5",
+    "pa11y-ci": "^3.0.0",
+    "pa11y-ci-reporter-html": "^3.0.2",
     "postcss": "^8.4.4",
     "postcss-cli": "^9.0.2",
     "rollup": "^2.60.2",
@@ -144,6 +150,7 @@
     "rtlcss": "^3.5.0",
     "sass": "^1.44.0",
     "shelljs": "^0.8.4",
+    "sirv-cli": "^1.0.14",
     "stylelint": "^13.13.1",
     "stylelint-config-twbs-bootstrap": "^2.2.4",
     "terser": "^5.10.0",