Website: fix outdated contributor documentation

Author: strager

website/README.md

@@ -16,9 +16,15 @@ browser.
 
 If you want to work on the demo, see [demo documentation](demo/README.md).
 
+If you want to work on the error documentation, see [errors
+documentation](public/errors/README.md).
+
 ## Packaging for deployment
 
-Prepare the website for publishing on GitHub pages by running `yarn build`:
+Prepare the website for publishing on GitHub pages by first building the [web
+demo](demo/README.md) and [quick-lint-js-wasm](../wasm/README.md).
+
+Then, run `yarn build`:
 
     $ cd website  # Navigate to this directory.
     $ yarn        # Install dependencies.

website/demo/README.md

@@ -9,13 +9,15 @@ To build the demo, install the [emscripten SDK][emscripten-sdk] and
     $ emmake cmake --install build-emscripten --component wasm-demo --prefix public/demo
 
 To run the demo on your own machine, execute the build instructions above, then
-run a static file server in the `website` directory:
+start the [local development web server](../README.md#Developing):
 
-    $ cd website  # Navigate to the parent of this directory.
-    $ python -m http.server 8080
+    $ cd website
+    $ yarn
+    $ yarn start
+    Server running: http://127.0.0.1:9001/
 
 Then, in your web browser, navigate to the demo page on the server (e.g.
-`http://localhost:8080/demo/`).
+`http://127.0.0.1:9001/demo/`).
 
 [Ninja]: https://ninja-build.org/
 [emscripten-sdk]: https://emscripten.org/docs/getting_started/downloads.html

website/public/cli/README.md

@@ -1,16 +1,17 @@
 # quick-lint-js errors
 
-This directory contains documentation on quick-lint-js' warnings and errors.
+This directory contains documentation on quick-lint-js' warnings and errors in
+HTML form.
 
 The source documents can be found in [docs/errors/](../../../docs/errors/). This
-directory contains HTML generated from those source documents.
+directory contains code to convert those source documents into HTML.
 
-## Generating
+## Setup
 
-    $ # Build the generator. See docs/BUILDING.md for more details.
-    $ mkdir build ; cd build ; cmake -G Ninja -DCMAKE_BUILD_TYPE=Debug .. ; cd "$OLDPWD"
-    $ ninja -C build quick-lint-js-generate-error-docs
+To show the page, you need to [build
+quick-lint-js-wasm](../../../wasm/README.md).
 
-    $ # Generate index.html:
-    $ ./build/docs/quick-lint-js-generate-error-docs \
-      docs/errors/ website/public/errors/index.template.html website/public/errors/index.html
+After building quick-lint-js-wasm, you might need to re-install it with Yarn:
+
+    $ cd website
+    $ yarn install --force