+## Security
+
+Jirafeau is run without privilidges with user id 2009. To make it able to open privilidged ports you can pass the capability, just stay with 8080 and use a reverse proxy or map the port 80:8080.
+```
+docker run -d -p 80:80 --sysctl net.ipv4.ip_unprivileged_port_start=80 mojo42/jirafeau
+docker run -d -p 8080:8080 mojo42/jirafeau
+docker run -d -p 80:8080 mojo42/jirafeau
+```
+
+## Options
+
+Jirafeau docker image now accept some options through environment variables to ease its configuration.
+More details about options in `lib/config.original.php`.
+
+Available options:
+- `FILE_HASH`: can be set to `md5` (default), `partial_md5` or `random`.
+