* QoL improvement -- Instead of needing to rename a config file so it is not read by MS a user can now use the 'enable' property in all source/client configs to enable or disable loading the config
* Added property to all config examples
* Hierarchical retries and delay options for sources and clients (override general config => individual config)
* Logging for retry attempts
* Respect Retry-After header on responses if present
* Refactor examples to all be multi-user structured
* Move configuration into its own file
* Separate config approaches into env/json approaches with guidance on which one to use
* Add more comments to example json
* Simplify main readme and provide a more opinionated, minimal example there
* Removed individual config file location vars in favor of using just CONFIG_DIR or json objects to reduce complexity
* Justified json example comments and removed unused variables
* Tables for env variable documentation in readme (and remove unused)
* Implement LOG_DIR docker volume
* Implement LOG_LEVEL environment for setting global log level
* Break out general config, spotify, and add maloja config
* Allow specifying a config dir from env that will be used as default search location for config files
* Use prefixes for envs and add more env options
* Simplify defaults for redirect/call on spotify config
