File access with [ProFTPD](http://www.proftpd.org/) over sftp and a static user/password.

# Volumes
- `/var/lib/ftp/data`: root directory for files
- `/etc/proftpd/keys`: ssh key files

# Environment Variables
## SERVER_NAME
Name displayed to connecting users.

## UMASK
- default: 006 007

Umask to use for files.

## STATIC_USER
A static username for authentication.

## STATIC_PASSWORD
Password for the static user.

## STATIC_UID
Uid for the static user.

## STATIC_GID
Gid for the static user.

# Ports
- 22