Add github actions to trigger jobs & verify operation

[vshlemon]

Add github actions for any pushes to verify:

• Within docker container that things work as expected (e.g. ogr2ogr is installed, file-sys locations can be accessed, http calls to server are possible etc. - format these as tests for docker somehow?)
• Without docker container that things work as expected (...as above)
• Ensure the linting checks are kicked off and passed
• Ensure the unit tests are kicked off and passed

[vshlemon]

There should be a way to run in docker e.g. BUT also need to find a way to:

• Report if there were any errors in the execution (we could catch exceptions to allow the programme to run start to finish for all countries, but would then need a way at the end to report how many issues and where - perhaps a test-suite would be the best way to achieve this & we could get a coverage %)