Improve mkdocs setp info

docs/docs.md

@@ -24,14 +24,22 @@ Refer to the
 
 Install `python` and `pipx`, for example with brew.
 
-Install mkdocs-material and all required dependencies:
+Install `mkdocs-material` and all required dependencies in the `mkdocs-material` 
+virtual environment for Python:
+
+```shell
+pipx install --include-deps mkdocs-material 
 ```
-pipx install --install-deps mkdocs-material
+
+Add plugins to the virtual environment:
+
+```shell
+pipx inject --include-deps mkdocs-material cairosvg
 ```
 
 Start the local site in the project root folder:
 
-```
+```shell
 cd trino-gateway
 mkdocs serve
 ```

docs/routing-rules.md

@@ -63,7 +63,7 @@ condition: 'request.getHeader("X-Trino-Client-Tags") contains "label=foo"'
 
 If no rules match, then request is routed to adhoc.
 
-### TrinoRequestUser
+[](){#trino-request-user}
 
 This class attempts to extract the user from a request. In order, it attempts