Add NPM script 'dev-docs' and document its usage

docs/.gitignore

@@ -1,3 +1,6 @@
 _site
 .sass-cache
 .jekyll-metadata
+
+# for the `npm run dev-docs` hack that creates a hard linked tree of release-source
+releases/dev

docs/CONTRIBUTING.md

@@ -27,15 +27,15 @@ gem install bundler
 # install all dependencies
 bundle install --path vendor/bundle
 
-# build the site
-bundle exec jekyll serve
+# build, serve and live-reload the site
+npm run dev-docs
 ```
 
 After that you can access the site at http://localhost:4000/
 
-Unfortunately, you will not see the full `release-source` without a little
-fiddling, as the site is excluded from Jekyll. So just supply a little symbolic
-link like this from the `./docs` dir: `mkdir releases && ln -s $PWD/release-source releases/latest`
+Unfortunately, you will not see the full `release-source`, as the site is excluded from
+Jekyll, but we made a little hack to expose the currently worked-on version.
+You can check out the currently worked on release docs under [`/releases/dev/release`](http://localhost:4000/releases/dev/release).
 
 ## Linting of Markdown
 

package.json

@@ -44,6 +44,7 @@
     "test": "npm run test-node && npm run test-headless && npm run test-webworker",
     "check-dependencies": "dependency-check package.json --no-dev --ignore-module esm",
     "build": "node ./build.cjs",
+    "dev-docs": "cd docs; cp -rl release-source releases/dev; npm run serve-docs",
     "build-docs": "cd docs; bundle exec jekyll build",
     "serve-docs": "cd docs; bundle exec jekyll serve --incremental --verbose --livereload",
     "lint": "eslint --max-warnings 99 '**/*.{js,cjs,mjs}'",