Make local HTTPS indexer easier to run

[dib542]

The indexer without a local SSL certificate will run without SSL. But in much of the indexer documentation it is assumed that users have a HTTPS indexer for the purpose of HTTP/2 event streaming (see #28)

The Docker and VSCode dev container environment could generate these files automatically upon container creation. The scripts for these could also be used as an example of how to set up this state without a Docker environment.