Update documentation for 0.23 (#2096)

* docs/acl: fix path to policy file

* docs/exit-node: fixup for 0.23

* Add newlines between commands to improve readability
* Use nodes instead on name
* Remove query parameter from link to Tailscale docs

* docs/remote-cli: fix formatting

* Indent blocks below line numbers to restore numbering
* Fix minor typos

* docs/reverse-proxy: remove version information

* Websocket support is always required now
* s/see detail/see details

* docs/exit-node: add warning to manual documentation

* Replace the warning section with a warning admonition
* Fix TODO link back to the regular linux documentation

* docs/openbsd: fix typos

* the database is created on-the-fly

* docs/sealos: fix typos

* docs/container: various fixes

* Remove a stray sentence
* Remove "headscale" before serve
* Indent line continuation
* Replace hardcoded 0.22 with <VERSION>
* Fix path in debug image to /ko-app/headscale

Fixes: #1822

aa

docs/running-headscale-linux-manual.md

@@ -1,9 +1,9 @@
 # Running headscale on Linux
 
-## Note: Outdated and "advanced"
+!!! warning "Outdated and advanced"
 
-This documentation is considered the "legacy"/advanced/manual version of the documentation, you most likely do not
-want to use this documentation and rather look at the distro specific documentation (TODO LINK)[].
+    This documentation is considered the "legacy"/advanced/manual version of the documentation, you most likely do not
+    want to use this documentation and rather look at the [distro specific documentation](./running-headscale-linux.md).
 
 ## Goal
 
@@ -45,12 +45,6 @@ describing how to make `headscale` run properly in a server environment.
       headscale
     ```
 
-1. Create an empty SQLite database:
-
-    ```shell
-    touch /var/lib/headscale/db.sqlite
-    ```
-
 1. Create a `headscale` configuration:
 
     ```shell