Add support for path based routing

[mkuklis]

Hey @kevinmcconnell this PR is an attempt to add support for path based routing based on: #48

I'm not sure if this is a good take (I'm also new to go) but maybe this is a good start.

[y-nk]

i really like this PR, i hope it merges 🙏

[gedw99]

This will help me to not have to use caddy .

thanks 🙏

[y-nk]

@kevinmcconnell 🙏

[kevinmcconnell]

@mkuklis thanks for contributing this, and sorry it took a while to properly respond to. This is a nice simple approach. However it does require the prefix to be a single path segment, which might be restrictive, so I'd like to try a way that allows for prefixes of any length. That means reworking some of the routing logic to support that sort of lookup, so it turns into a somewhat bigger change.

So I've taken a slightly different approach to this in #113. It's similar in purpose to what you have here, but allows arbitrarily-long path segments, and provides the option to also strip that prefix before forwarding the request upstream.

[mkuklis]

Thank you @kevinmcconnell! I'm going to close this PR. Thank you for your work. I think this will be an exciting addition!