Create the Planwise Tools Docker Image

[ggiraldez]

Closes #669

Creates a new Docker image with the build which includes tools necessary for adding support for a new country to a Planwise installation. In development, this can be used by running the tools container of the compose. In production, a new container needs to be added to the installation with a similar environment as the application container (PostgreSQL connection and DATA_PATH environment variables are required).

• Build the new tools image and deploy to the container registry
• Add a container to the development compose file
• Add all scripts and tools necessary for adding support for a new country: importing the country boundaries, loading them into the database, clipping the friction layer for the new region, updating the regions reduced GeoJSON previews and managing the raster source sets
• Remove deprecated scripts and documentation
• Deprecate the old method for computing the region previews, using PostGIS functions; the new method using mapshaper is more robust and produces quality output
• Include other basic tools in the image, most notably GDAL and the PostgreSQL client