A basic container for a MediaGoblin media server (https://mediagoblin.org/), including Nginx and uWSGI. Assumes a separate PostgreSQL database for persistence, and an email relay host for sending email notifications.
Source at https://projects.torsion.org/witten/mediagoblin-docker
## Environment variables
`NOTIFICATION_EMAIL`: From address for MediaGoblin notification emails.
`EMAIL_RELAY_HOST`: Hostname used to send outgoing notification emails. Since MediaGoblin isn't terribly configurable as an email client, it's recommended that this "host" is a mail relay like https://hub.docker.com/r/alterrebe/postfix-relay/.
`DATABASE_URL`: Connection string for database to use for persistence, including credentials. See example below.
`/app/user_dev`: Location to store user media uploads.
`80`: Only listens on port 80 for HTTP. Intended to be used in conjunction with an external reverse proxy like https://hub.docker.com/r/jwilder/nginx-proxy/ to provide HTTPS or anything else that's needed.