Fix bugs, simplify/fix dependencies, and improve deployment process

[cortadocodes]

Contents (#60)

Enhancements

• Add port-polling script to determine which port the Bluetooth receiver is plugged into on rPi

Fixes

• Instantiate serial.Serial inside of processes instead of sharing one instance between them
• Ensure metadata is saved on microphone datafile
• Remove duplicate log message

Operations

• Add COMPUTE_PROVIDER=GOOGLE_CLOUD_FUNCTION envvar to deployments in cloudbuild.yaml so logs are formatted correctly for Google Cloud
• Make cloud function builds concurrent in cloudbuild.yaml

Dependencies

• Make h5py a dev dependency
• Remove pandas and scipy dependencies
• Update python compatibility to >=3.7.1, <3.10
• Use octue==0.27.3 in cloud function and package
• Pin to grpcio==1.45.0 for Raspberry Pi compatibility
• Update black to remove click conflict

Documentation

• Update development installation instructions for different platforms/architectures

Other

• Add devcontainer for vscode users to run out of the box

[codecov-commenter]

Codecov Report

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@@                       Coverage Diff                        @@
##             feature/multiple-node-support      #60   +/-   ##
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  Branches                                 ?        0           
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[cortadocodes]

After switching to instantiating serial.Serial in the Reader process as well as the MainProcess, the following error is now raised when starting the gateway on Windows

<Result SerialException("could not open port 'COM12': PermissionError(13, 'Access is denied.', None, 5)")>
Process Reader:
Traceback (most recent call last):
  File "C:\Users\rapha\AppData\Local\Programs\Python\Python39\lib\multiprocessing\process.py", line 315, in _bootstrap
    self.run()
  File "C:\Users\rapha\AppData\Local\Programs\Python\Python39\lib\multiprocessing\process.py", line 108, in run
    self._target(*self._args, **self._kwargs)
  File "c:\Workspace\data-gateway\data_gateway\packet_reader.py", line 81, in read_packets
    serial_port = get_serial_port(
  File "c:\Workspace\data-gateway\data_gateway\serial_port.py", line 27, in get_serial_port
    serial_port = serial.Serial(port=serial_port_name, baudrate=configuration.baudrate)
  File "C:\Workspace\data-gateway\venv\lib\site-packages\serial\serialwin32.py", line 33, in __init__
    super(Serial, self).__init__(*args, **kwargs)
  File "C:\Workspace\data-gateway\venv\lib\site-packages\serial\serialutil.py", line 244, in __init__
    self.open()
  File "C:\Workspace\data-gateway\venv\lib\site-packages\serial\serialwin32.py", line 64, in open
    raise SerialException("could not open port {!r}: {!r}".format(self.portstr, ctypes.WinError()))
serial.serialutil.SerialException: could not open port 'COM12': PermissionError(13, 'Access is denied.', None, 5)
<Result SerialException("could not open port 'COM12': PermissionError(13, 'Access is denied.', None, 5)")>
<Result okay>