Added help img.

README.md

@@ -3,10 +3,14 @@ Run a seafile client inside docker witch can sync files from seafile repositorie
 
 See docker-compose how to use.
 
-## environment variables:
- - LIBRARY_ID=<your-library-id-here>   Can be multiple library ids seperated with colon :
- - SERVER_URL=<server-url>             The url used to access your server, eg: https://example.seafile.com
- - SERVER_PORT=<server-port>           Which port the server is hosted on: usually 443 (https) or 80 (http)
- - USERNAME=<username>                 Your account username (credentials)
- - PASSWORD=<password>                 Your account password (credentials)
- - DATA_DIR=<directory-path-to-sync>   The path where to put the files
+## Environment variables:
+ - LIBRARY_ID=your-library-id-here   Can be multiple library ids seperated with colon :
+ - SERVER_URL=server-url             The url used to access your server, eg: https://example.seafile.com
+ - SERVER_PORT=server-port           Which port the server is hosted on: usually 443 (https) or 80 (http)
+ - USERNAME=username                 Your account username (credentials)
+ - PASSWORD=password                 Your account password (credentials)
+ - DATA_DIR=directory-path-to-sync   The path where to put the files
+
+## How to find library id:
+
+<img src="imgs/help.png"/>