Build container in one shot

[iakat]

This builds acarshub in one shot, not needing 3 dockerfiles (+upstream's)

Tested n=1 on my Pi (my repo branch=main has a github actions to build it)

This leaves out the BUILD_EXTRA which you would need to pass at build time to populate with the CI run number.

I also kept getting

[webapp      ] 2023/09/07 00:46:45 Traceback (most recent call last):
[webapp      ] 2023/09/07 00:46:45   File "/webapp/SafeScheduler.py", line 33, in _run_job
[webapp      ] 2023/09/07 00:46:45     super()._run_job(job)
[webapp      ] 2023/09/07 00:46:45   File "/usr/local/lib/python3.11/dist-packages/schedule/__init__.py", line 172, in _run_job
[webapp      ] 2023/09/07 00:46:45     ret = job.run()
[webapp      ] 2023/09/07 00:46:45           ^^^^^^^^^
[webapp      ] 2023/09/07 00:46:45   File "/usr/local/lib/python3.11/dist-packages/schedule/__init__.py", line 693, in run
[webapp      ] 2023/09/07 00:46:45     ret = self.job_func()
[webapp      ] 2023/09/07 00:46:45           ^^^^^^^^^^^^^^^
[webapp      ] 2023/09/07 00:46:45   File "/webapp/acarshub.py", line 467, in init_listeners
[webapp      ] 2023/09/07 00:46:45     if not thread_html_generator.is_alive():
[webapp      ] 2023/09/07 00:46:45            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[webapp      ] 2023/09/07 00:46:45 AttributeError: 'EventletThread' object has no attribute 'is_alive'

so switched the check for thread_html_generator as it becomes a engineio.async_drivers.eventlet.EventletThread which does not have is_alive -- but has a g attribute. https://github.com/miguelgrinberg/python-engineio/blob/main/src/engineio/async_drivers/eventlet.py

[fredclausen]

Thank you for this @katlol!