feat: change default media location to /data (#20367)

* feat!: change default media location to /data

* feat: dynamically detect media location

server/src/commands/media-location.command.ts

@@ -61,7 +61,7 @@ export class ChangeMediaLocationCommand extends CommandRunner {
       immich-server:
         ...
         volumes:
-          - \${UPLOAD_LOCATION}:/usr/src/app/upload
+          - \${UPLOAD_LOCATION}:/data
         ...
   )`;