Config File Updates Overview

[wtgee]

• Add lots of documentation to config file to explain options.
• Rely on config file instead of env vars (Consider dropping most environment variables #555).
• Ability to override individual nested keys.
  • Via config server
  • Via pocs_local.yaml file.
• pyserial options Support pyserial options in yaml files #181
• Save config in local file Save the config in a local file #238
• issues with testing and config test_local_config affected by local configuration #259
• Target constraints in config Specify constraints in config file #402

Maybe:

• Have a directory config file in $PANDIR and a script for parsing (discussed in Consider dropping most environment variables #555).
• Add a get_config_value('mount.serial.port') that can be used to retrieve a single (nested) value, mostly for use in utility functions. -or-
• Add a config query service.
• Convert config to ChainMap rather than using a simple dict update. This allows for updates to underlying configs and easier overriding.
• Consider using the pydantic Settings module.

Would be nice:

• Web/notebook interface (Create a "Setup POCS Config File" Notebook panoptes-tutorials#48)