docs(install): warn that VPS browser consoles mangle special chars (#36279) (#38811)

Some VPS providers (Hetzner Cloud and others) offer a browser-based
console for managing hosts. These consoles transmit special characters
incorrectly — ':' may arrive as ';', '@' may be mis-rendered, and
non-English keyboard layouts fare worse — which silently corrupts
'docker run' arguments like '-v ~/.hermes:/opt/data', '-e KEY=value',
and pasted API keys / tokens.

Adds a :::caution admonition above the Quick start 'docker run' block
in website/docs/user-guide/docker.md recommending SSH for copy-paste-
safe command entry, with manual-typing guidance as a fallback.

Pure docs change, no code touched.

Closes #36279

Co-authored-by: Bedirhan Celayir <bedirhancode@users.noreply.github.com>

website/docs/user-guide/docker.md

@@ -17,6 +17,19 @@ This page covers option 1. The container stores all user data (config, API keys,
 
 If this is your first time running Hermes Agent, create a data directory on the host and start the container interactively to run the setup wizard:
 
+:::caution Avoid browser-based VPS consoles for the install commands
+Some VPS providers (Hetzner Cloud, and several others) offer a browser-based
+console for managing hosts. These consoles transmit special characters
+incorrectly — `:` may arrive as `;`, `@` may be mis-rendered, and non-English
+keyboard layouts fare worse — which silently corrupts `docker run` arguments
+like `-v ~/.hermes:/opt/data`, `-e KEY=value`, and pasted API keys / tokens.
+
+**Connect over SSH instead** (`ssh root@<host>`) for copy-paste-safe command
+entry. If you must use the browser console, type the commands manually
+instead of pasting, and double-check every `:`, `@`, `=`, and `/` in the
+result before hitting Enter.
+:::
+
 ```sh
 mkdir -p ~/.hermes
 docker run -it --rm \