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-sealos.md

@@ -13,7 +13,7 @@ This documentation has the goal of showing a user how-to run `headscale` on Seal
 
 ## Running headscale server
 
-1. Click the following prebuilt template(version [0.23.0-alpha2](https://github.com/juanfont/headscale/releases/tag/v0.23.0-alpha2)):
+1. Click the following prebuilt template:
 
    [![](https://cdn.jsdelivr.net/gh/labring-actions/templates@main/Deploy-on-Sealos.svg)](https://cloud.sealos.io/?openapp=system-template%3FtemplateName%3Dheadscale)
 
@@ -41,7 +41,7 @@ tailscale up --login-server YOUR_HEADSCALE_URL
 To register a machine when running headscale in [Sealos](https://sealos.io), click on 'Terminal' button on the right side of the headscale application's detail page to access the Terminal of the headscale application, then take the headscale command:
 
 ```bash
-headscale --user myfirstuser nodes register --key <YOU_+MACHINE_KEY>
+headscale --user myfirstuser nodes register --key <YOUR_MACHINE_KEY>
 ```
 
 ### Register machine using a pre authenticated key