chore(readme): update config/scaling docs (#249)

Signed-off-by: Anupam Kumar <kyteinsky@gmail.com>

Author: kyteinsky

README.md

@@ -116,12 +116,8 @@ Make sure to restart the app after changing the config file. For docker, this wo
 
 This is a file copied from one of the two configurations (config.cpu.yaml or config.gpu.conf) during app startup if `config.yaml` is not already present to the persistent storage. See [Repair section](#repair) on details on the repair step that removes the config if you have a custom config.
 
-The default way is to spawn an embedding server backed by llama.cpp, where the local model runs on either CPU or GPU. The other option is to use a remote model from a OpenAI-compatible API. The configuration for the remote model is also present in the sample config files.
-API key or username/password for the remote API can be stored in the config file itself or environment variables can be used. `CCB_EM_APIKEY` for the API key and `CCB_EM_USERNAME` and `CCB_EM_PASSWORD` for the username and password respectively.
-To indicate the use of environment variables, set the value of `auth` in the config file to `from_env`, like so:
-```yaml
-auth: from_env
-```
+The default way is to spawn an embedding server backed by llama.cpp, where the local model runs on either CPU or GPU. The other option is to use a remote model from a OpenAI-compatible API.
+The configuration for the remote model can be done in the `embedding` section of the config file or environment variables can be set during the deployment of the app. The environment variables override the config. See the [Scaling section](https://docs.nextcloud.com/server/latest/admin_manual/ai/app_context_chat.html#scaling) in the admin docs for more details.
 
 ## Repair
 v2.1.0 introduces repair steps. These run on app startup.