Add support for running the style with Docker(-compose)

[hiddewie]

Taken from https://github.com/gravitystorm/openstreetmap-carto/blob/master/DOCKER.md

This guide makes setting up the database, mapnik, data and kosmtik much simpler, and without having to import data into the database running on the system.

See https://github.com/cyclosm/cyclosm-cartocss-style/blob/64461f470911da807bce852d5a8e106efabadeef/docs/DOCKER.md for textual documentation on getting started.

[hiddewie]

This might need some extra info on downloading shapefiles & elevation, and generating contours and hillshading.

[hiddewie]

What about downloading height information and generating hillshade and contours?

[Phyks]

For contours, the easiest way to go is probably to use phyghtmap which handles both downloading height information and generating contours, for a specific area. Note however that contours are not yet in production, we are in the process of importing them at the moment.

Provided you can download height information, generating hillshades should be a matter of gdal commands : https://github.com/cyclosm/cyclosm-cartocss-style/blob/master/docs/INSTALL.md#create-hillshades.

[Phyks]

Thanks for this PR!

There was a fork of a Docker tile server featured in OSM weekly some time ago, which includes CyclOSM as well, see https://github.com/mhajder/openstreetmap-tile-server-cyclosm (mentionned in https://github.com/cyclosm/cyclosm-cartocss-style#related-projects). What are the main differences? (might be worth emphasizing it in the README.me or DOCKER.md file).

[hiddewie]

Thanks for the comments. I will improve this documentation.

I ran CyclOSM with the overv docker images (what the mhayder repository is cloned from) before, but the importing process was a less reliable than the docker compose file in the Carto style repository. Both work, and both produce roughly the same results.

A difference I like for this setup is the default configuration with a db, import and kosmtik image/container, which can be used with docker-compose without the need to remember environment variables and settings to start the import/tile-server Docker containers manually.

The Overv docker image also contains no kosmtik, and this has to be run by hand against the (Docker) tile server (I used joxit/kosmtik before).

[Phyks]

Thanks!