RuntimeError: Cannot initialize proj_transform for given projections without proj4 support (-DMAPNIK_USE_PROJ4)

[tychuang1211]

For anyone who runs into this error:

The Docker base image v2.1.0 to v2.3.0 (latest) is built on ubuntu:22.04, which has a known issue: libmapnik is compiled without proj support in ubuntu 22.04.

Solution:
Use v2.0.1 or earlier, which are based on ubuntu:20.04 and do not have this problem.