Adding default.yml config creation using fly secrets
Created by: chrischabot
Adding default.yml config creation using fly secrets: DB_URL and REDIS_URL
By using this user names, passwords and hosts can be hidden in the fly envirionment variables instead of being hard coded in the config file
Set these to your local connection url if you're developing locally
create_config.sh parses the connection strings from the two env variables, and fills them in using sed in the template config file: wibblur.yml