fix links & build with --strict

.github/workflows/docs.yml

@@ -41,7 +41,7 @@ jobs:
           restore-keys: |
             mkdocs-material-
       - run: pip install -r requirements.txt
-      - run: mkdocs build --verbose
+      - run: mkdocs build --verbose --strict
       - uses: actions/upload-pages-artifact@v1
         with:
           path: 'site'

docs/getting-started.md

@@ -8,7 +8,7 @@ Welcome to the Lavalink Getting Started guide. If you're new to Lavalink, follow
 
 1. Install Java 17 or higher. You can download it [here](https://www.azul.com/downloads/?package=jdk#zulu).
 2. Download the latest `Lavalink.jar` from [here](https://github.com/lavalink-devs/Lavalink/releases/latest).
-3. Check out the [configuration](configuration) page to learn how to configure Lavalink.
+3. Check out the [configuration](configuration/index.md) page to learn how to configure Lavalink.
 4. Run Lavalink with `java -jar Lavalink.jar`.
 
 Now you can connect to Lavalink with your Lavalink Client. You can find a list of clients [here](clients.md).

mkdocs.yml

@@ -12,17 +12,17 @@ edit_uri: edit/master/docs/
 copyright: Copyright © 2017-2021 Lavalink Contributors
 
 nav:
-  - Home: /
+  - Home: index.md
   - Getting Started: getting-started.md
   - Configuration:
-      - configuration
+      - configuration/index.md
       - Binary: configuration/binary.md
       - Systemd: configuration/systemd.md
       - Docker: configuration/docker.md
   - Clients: clients.md
   - Plugins: plugins.md
   - API:
-      - api
+      - api/index.md
       - Websocket: api/websocket.md
       - Rest: api/rest.md
       - Plugins: api/plugins.md