docs: server commands (#1079)

docs/docs/usage/_category_.json

@@ -1,5 +1,5 @@
 {
-  "label": "How to use the application",
+  "label": "Usage",
   "position": 3,
   "link": {
     "type": "generated-index",

docs/docs/usage/server-commands.md

@@ -0,0 +1,25 @@
+---
+sidebar_position: 5
+---
+
+# Server Commands
+
+The `immich-server` docker image comes preinstalled with an administrative CLI that supports the following commands:
+
+| Command                       | Description                           |
+| ----------------------------- | ------------------------------------- |
+| `immich help`                 | Display help                          |
+| `immich reset-admin-password` | Reset the password for the admin user |
+
+## How to run a command
+
+To run a command, connect to the container and then execute it. For example:
+
+```bash
+docker exec -it immich-server_1 sh
+
+/usr/src/app$ immich reset-admin-password
+? Please choose a new password (optional) immich-is-awesome-unline-this-password
+New password:
+immich-is-awesome-unline-this-password
+```