To change the config file path for dev-mode introducing changes to the `ConfigManager.load()` method to use config file path as a parameter instead of the config file path inside the method itself.
Linear task: [[ https://linear.app/comm/issue/ENG-1101/read-env-variables-to-change-the-dynamodb-table-names-and-amqp-uri-in | ENG-1101 ]]