Add infos about authentication

README.md

@@ -7,13 +7,11 @@ It is not intended to work on a desktop computer.
 
 ## Features
 
-- Use basic auth credentials (from Nginx/Apache) or use the embedded Database to manage users.
 - Watch your comic books on your phone or tablet, at home or on the go.
-- Uses your filesystem, no need for a database
-- Read images from a folder
-- CBZ/CBR Files Support
-- PDF Support
+- Uses your filesystem, has an embedded database.
+- Supports most comics formats : CBZ/CBR/ZIP/RAR, PDF, simple image directory.
 - Internal search engine to find your comics easily
+- Use basic auth credentials (from Nginx/Apache) or use the embedded Database to manage users.
 
 ## Installing
 
@@ -42,6 +40,30 @@ You can then start the server with `yarn start`.
 
 This will index the books and start the server.
 
+## Authentication
+
+Authentication is an optional feature, you can either leverage the basic auth credentials from a server (Apache/Nginx)
+Or use the built-in database.
+
+This option can be changed in `config.js` with the `auth` configuration or the `COMICS_AUTH_TYPE` environment variable.
+possible values are "basic" (default) or "db"
+
+When using the "db" authentication mode, you need to create users, for this we provide a command-line tool to create them.
+
+Note that the container has to be stopped in order to use the CLI tool as the database is otherwise readonly.
+
+### Creating users
+
+```bash
+sudo docker run --rm -it -v your_images_dir:/comics onigoetz/comicsreader node comics createUser
+```
+
+### Changing password
+
+```bash
+sudo docker run --rm -it -v your_images_dir:/comics onigoetz/comicsreader node comics changePassword
+```
+
 ## Tweaking the configuration
 
 ### Basedir