Issue running open source demo installation

[lnenad]

There is an issue when running the open source demo installation for 0.8.2 using docker compose. When trying to run the after clone the trucardi-api image is unable to run due to being unable to connect to MySQL. MySQL isn't mentioned anywhere in the docs, I've tried running it separately, tried adding it to the docker-compose.yml file, both unsuccessfully.

Steps:

• Git clone this repository
• cd trucardi-api
• docker-compose up
• Trucardi-api dumps multiple log lines of being unable to run due to not being able to connect to MySQL.

0.8.1 version works as expected.