Feature: set config vars for postgre connection string

[pconerly]

The redis plugin for dokku sets a config var for the redis url. It'd be cool if this project had a config var for that too!

https://github.com/luxifer/dokku-redis-plugin/blob/master/commands#L101-L113

[cameron-martin]

By looking at the source code, it should create an environment variable called DATABASE_URL

https://github.com/Kloadut/dokku-pg-plugin/blob/master/commands#L167

[rchrd2]

I can confirm that it created the DATABASE_URL env variable.

[thepuzzlemaster]

This issue should be closed. It creates the variable after you run the link command.

[pconerly]

sounds good, thanks