docs: remove niche customization sections from FAQ and install guide

Remove login page customization sections from FAQ.md and install.md as they were too specific for those documents. Move customization reference to guide.md where it's more appropriate.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: strickvl

docs/FAQ.md

@@ -81,22 +81,6 @@ You can change the config file's location using the `--config` flag or
 
 The default location respects `$XDG_CONFIG_HOME`.
 
-### Login page customization
-
-You can customize the login page using the `--custom-strings` flag:
-
-```bash
-code-server --custom-strings '{"LOGIN_TITLE": "My Code Server", "WELCOME": "Welcome to my portal"}'
-```
-
-Or use a JSON file:
-```bash
-code-server --custom-strings /path/to/custom-strings.json
-```
-
-Legacy individual flags (`--app-name`, `--welcome-text`) are still supported but deprecated.
-
-For detailed customization options and examples, see the [customization guide](./customization.md).
 
 ## How do I make my keyboard shortcuts work?
 

docs/README.md

@@ -61,7 +61,6 @@ code-server.
 We also have an in-depth [setup and
 configuration](https://coder.com/docs/code-server/latest/guide) guide.
 
-You can also customize the login page appearance - see our [customization guide](./customization.md).
 
 ## Questions?
 

docs/guide.md

@@ -458,3 +458,7 @@ By default, if you have auth enabled, code-server will authenticate all proxied
 requests including preflight requests. This can cause issues because preflight
 requests do not typically include credentials. To allow all preflight requests
 through the proxy without authentication, use `--skip-auth-preflight`.
+
+## Internationalization and customization
+
+You can customize some of code-server's strings for either internationalization or customization purposes. See our [customization guide](./customization.md).

docs/install.md

@@ -287,33 +287,6 @@ docker run -it --name code-server -p 127.0.0.1:8080:8080 \
   codercom/code-server:latest
 ```
 
-### Customizing the login page
-
-You can customize the login page using the `--custom-strings` flag:
-
-```bash
-# Example with inline JSON customization
-docker run -it --name code-server -p 127.0.0.1:8080:8080 \
-  -v "$PWD:/home/coder/project" \
-  codercom/code-server:latest --custom-strings '{
-    "LOGIN_TITLE": "My Development Environment",
-    "WELCOME": "Welcome to your coding workspace",
-    "PASSWORD_PLACEHOLDER": "Enter your secure password",
-    "SUBMIT": "ACCESS"
-  }'
-```
-
-Or mount a JSON file:
-
-```bash
-# Example with JSON file
-docker run -it --name code-server -p 127.0.0.1:8080:8080 \
-  -v "$PWD:/home/coder/project" \
-  -v "$PWD/custom-strings.json:/config/strings.json" \
-  codercom/code-server:latest --custom-strings /config/strings.json
-```
-
-For detailed customization options, see the [customization guide](./customization.md).
 
 Our official image supports `amd64` and `arm64`. For `arm32` support, you can
 use a [community-maintained code-server