add library libgeos-dev to install

[scotthraban]

Please consider this change - I attempted to build the docker image myself using the multi-arch buildx way, as I wanted to try to run this image on a Raspberry PI.

The install docs do say that it is needed, maybe it is possible that the phusion/baseimage for arm64 does not include the library?

I would think that it would not be harmful to include this library by default and if it is already installed then it will just be skipped.

Thanks for your consideration!

[scotthraban]

Oh, duh, I neglected to include the failure seen while building the image:

#11 134.0 Collecting Shapely
#11 134.1   Downloading Shapely-1.7.1.tar.gz (383 kB)
#11 136.0     ERROR: Command errored out with exit status 1:
#11 136.0      command: /usr/bin/python3 -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-install-66nhjsz9/Shapely/setup.py'"'"'; __file__='"'"'/tmp/pip-install-66nhjsz9/Shapely/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-install-66nhjsz9/Shapely/pip-egg-info
#11 136.0          cwd: /tmp/pip-install-66nhjsz9/Shapely/
#11 136.0     Complete output (11 lines):
#11 136.0     Failed `CDLL(libgeos_c.so.1)`
#11 136.0     Failed `CDLL(libgeos_c.so)`
#11 136.0     Traceback (most recent call last):
#11 136.0       File "<string>", line 1, in <module>
#11 136.0       File "/tmp/pip-install-66nhjsz9/Shapely/setup.py", line 85, in <module>
#11 136.0         from shapely._buildcfg import geos_version_string, geos_version, \
#11 136.0       File "/tmp/pip-install-66nhjsz9/Shapely/shapely/_buildcfg.py", line 169, in <module>
#11 136.0         lgeos = load_dll('geos_c',
#11 136.0       File "/tmp/pip-install-66nhjsz9/Shapely/shapely/_buildcfg.py", line 162, in load_dll
#11 136.0         raise OSError(
#11 136.0     OSError: Could not find library geos_c or load any of its variants ['libgeos_c.so.1', 'libgeos_c.so']
#11 136.0     ----------------------------------------
#11 136.0 ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.