+- `DOWNLOAD_PASSWORD_REQUIREMENT`: set to 'optional' (default), 'required' or 'generated' to make a password for downloading optional, required or generated
+- `DOWNLOAD_PASSWORD_GEN_LEN`: set length of generated download passwords
+- `DOWNLOAD_PASSWORD_GEN_CHARS`: set characters used for generated download passwords
+- `DOWNLOAD_PASSWORD_POLICY`: set to 'regex' to use a regular expression to check user provided download passwords for complexity constraints
+- `DOWNLOAD_PASSWORD_POLICY_REGEX`: regex to check against if password policy is set to regex
+
+Example:
+```
+docker run -it -p 8080:80 --rm -e ADMIN_PASSWORD='p4ssw0rd' -e WEB_ROOT='jirafeau.mydomain.com/' -e UPLOAD_PASSWORD='foo,bar' -e PREVIEW=0 mojo42/jirafeau:latest
+```
+
+## Data storage
+
+Files and links are stored in `/data` by default. Subfolders are automatically created with needed permissions at creation if needed.
+Note that configuration is not stored in /data.
+
+Example of using a dedicated volume to store Jirafeau data separately from the container:
+```
+docker volume create jirafeau_data
+docker run -it --rm -p 8080:80 --mount source=jirafeau_data,target=/data mojo42/jirafeau:latest
+```