Updated Authentication (markdown)

Authentication.md

@@ -1 +1,48 @@
-wip
+# THIS FEATURE IS STILL IN DEVELOPMENT
+
+### Set custom password
+To set your own password, simply pass `PASSWORD=your_password` environment variable to your `docker run` command or your `docker-compose` file.
+
+> If custom password is not provided, default password `flame_password` will be used.
+
+- Command example
+```bash
+docker run -p 5005:5005 -v /path/to/data:/app/data -e PASSWORD=my_password flame
+```
+
+- File example
+```yaml
+version: '2.1'
+services:
+  flame:
+    image: pawelmalak/flame:latest
+    container_name: flame
+    volumes:
+      - <host_dir>:/app/data
+    ports:
+      - 5005:5005
+    environment:
+       - PASSWORD=my_password
+    restart: unless-stopped
+```
+
+### Login
+To login, go to `Settings > App`. Authentication section contains form with two inputs:
+- **password**: your password
+- **session duration**: how long auth token should be valid for 
+
+### Visibility
+Authenticated user has access to:
+- all apps
+- all categories
+- all bookmarks
+- all editors
+- all settings
+
+Guest user has access to:
+- x
+- categories set to public
+- bookmarks set to public
+- Theme and App sections of settings
+
+> If category is set to `hidden`, all bookmarks associated with it will also be hidden. Setting `visible` on specific bookmark **will not be respected**.