Add test run of Docker image with command

[luandro]

Goal

Do some basic testing using the deployed Docker image, for PR as well as releases.

• Test run of Docker image with self-provided style
• Test run of Docker image with Bing source
• Test run of Docker image with Esri source and GeoJSON overlay
• Test run of Docker image with Mapbox and Mapbox Style
• Test run of Docker image with Planet source

What I changed

Runs a simple scrapping of tiles up to zoom 10 to check everything is smorking.

What I'm not doing here

Write tests of every command. Ideally should have a basic test suite in NodeJS as well.

[rudokemper]

This is great!