Add Docker container for development

[robwoolley]

This Docker container is based on the osrf/ros2:devel container image. It adds the additional dependencies required to develop superflore.

It may be used independently, but it is intended for use as a VSCode devcontainer for development of superflore.

[robwoolley]

The CI tests fail with the following message:

b"/home/runner/work/superflore/superflore/tests/../superflore/generators/ebuild/gen_packages.py:159:80: E501 line too long (88 > 79 characters)\n/home/runner/work/superflore/superflore/tests/../superflore/generators/ebuild/gen_packages.py:177:80: E501 line too long (99 > 79 characters)\n/home/runner/work/superflore/superflore/tests/../superflore/generators/ebuild/gen_packages.py:212:80: E501 line too long (88 > 79 characters)\n/home/runner/work/superflore/superflore/tests/../superflore/generators/ebuild/overlay_instance.py:85:13: F841 local variable 'chunk_count' is assigned to but never used\n/home/runner/work/superflore/superflore/tests/../superflore/generators/ebuild/overlay_instance.py:99:80: E501 line too long (80 > 79 characters)\n5\n"
b'/home/runner/work/superflore/superflore/tests/../superflore/generators/ebuild/gen_packages.py:159:80: E501 line too long (88 > 79 characters)\n/home/runner/work/superflore/superflore/tests/../superflore/generators/ebuild/gen_packages.py:177:80: E501 line too long (99 > 79 characters)\n/home/runner/work/superflore/superflore/tests/../superflore/generators/ebuild/gen_packages.py:212:80: E501 line too long (88 > 79 characters)\n/home/runner/work/superflore/superflore/tests/../superflore/generators/ebuild/overlay_instance.py:99:80: E501 line too long (80 > 79 characters)\n4\n'

These are not files being changed in this commit. They are specific to the ebuild generator which is unrelated to the Docker container.

This is solved by #308 .

[nuclearsandwich]

I don't remember exactly how python packaging handles extraneous files. Do we need to explicitly "ignore" these so that they aren't incorporated into the packaged archive or does this count as a data file which pip won't include unless told.

[robwoolley]

Thanks, I'll look into this.

[robwoolley]

This doesn't seem to be a problem for Setuptools, Poetry, Flit, Hatch, or PDM. Most have explicit include and excludes lists, but setuptools also has a few pre-defined files that get automatically included: https://setuptools.pypa.io/en/latest/userguide/miscellaneous.html

It doesn't seem like the Dockerfile or setup script would get automatically included.