Serverless

Right now settings are just passed in through the settings file. This is somewhat limiting if there is a value that will be dynamic with deployments (such as a docker image file, etc.) We should support accepting settings through environment variables, the CLI, the current settings file, and any mix of those.

The order of precedence with mixed should be CLI -> environment -> config file.

If

Should add a section to the docs for third-party examples and guides using Mangum

Expected Behaviour

Remove remaining Docker Swarm references

Current Behaviour

Make all the Lambda functions use Arm64 instead of x86_64.

Currently, we use a multiprocess pool to retrieve RGB bands in parallel, and fall back to sequential retrieval if that is not available. I would prefer having this as a setting, potentially also with the possibility to use a thread pool. We moved away from threading after experiencing race conditions within GDAL, but that might not always be a problem (for example, the issue might be fixed in rece