fix broken links in intro and update readme

README.md

@@ -7,37 +7,17 @@ This website is built using [Docusaurus](https://docusaurus.io/), a modern stati
 ### Installation
 
 ```
-$ yarn
+$ npm install
 ```
 
 ### Local Development
 
 ```
-$ yarn start
+$ npm start
 ```
 
 This command starts a local development server and opens up a browser window. Most changes are reflected live without having to restart the server.
 
-### Build
-
-```
-$ yarn build
-```
-
-This command generates static content into the `build` directory and can be served using any static contents hosting service.
-
 ### Deployment
 
-Using SSH:
-
-```
-$ USE_SSH=true yarn deploy
-```
-
-Not using SSH:
-
-```
-$ GIT_USER=<Your GitHub username> yarn deploy
-```
-
-If you are using GitHub pages for hosting, this command is a convenient way to build the website and push to the `gh-pages` branch.
+The page is deployed automatically via GitHub Actions.

docs/intro.md

@@ -14,11 +14,11 @@ If you have questions, the game's creator and many level creators are available
 
 # Level structure
 
-A level is a directory that contains a [manifest](API_manifest) and Lua files. The Lua files fall in three categories:
+A level is a directory that contains a [manifest](file-information/manifest-files) and Lua files. The Lua files fall in three categories:
 
-- Files that describe [graphics](API_meshes).
-- Files that describe [sounds](API_sounds).
-- Files that describe the behavior of the level. They make use of the [pewpew](API_pewpew_lib) and [fmath](API_fmath_lib) libraries, which require an understanding of the [types](API_types) used.
+- Files that describe [graphics](file-information/mesh-files).
+- Files that describe [sounds](file-information/sound-files).
+- Files that describe the behavior of the level. They make use of the [pewpew](api/pewpew-library) and [fmath](api/fmath-library) libraries, which require an understanding of the [types](api/types) used.
 
 # Uploading your level