Implement PostGIS Worker

Created by: ghost

Worker using RQ.

• Move worker database (PostGIS) into the worker container

Implement Support for types:

• fgdb (file geo database)
• spatialite
• gpkg (geopackage)
• shp

Write into queue:

• overall status for conversion(s) -> is done by RQ already

Communication:

• 'shared' communication protocol for stati etc (automatically through RQ)

NFR:

• Only execute bootstrap (filling of database) once, even if there are more than one type selected.