Make generic for calling from anywhere

We have handlers and callers for JS and Python. We should have generic. Recommend one of 2 ways (actually both):

1. Explicitly expose the API. Let any app know "if I make a network call to the following address with the following parameters, a function will be invoked".
2. Create a static binary (probably in go) that know how to make a request and listen to requests.

Allows any container to listen and request, both using a convenient binary and native API.

Start by reviewing the existing JavaScript and Python handlers and callers. Compare the two proposed integration paths: an explicitly exposed network API and a static Go binary that can make and listen for requests. Done means arbitrary containers can use the API and the convenient binary.

Written by the indexing model from the issue text.