Refactor api-gateway router implementation

[mschuwalow]

Currently postgres is in the hot path of handling user requests. This will not scale and should be refactored.

A potential idea is to precompile a regex using regex-automata whenever the deployments for a particular host change and store that in the blob storage.
Whenever the gateway handles a user requests this precompiled regex could be fetched from the blob storage and used to identify which of the routes for a particular host matches the request.