v0.3.0

Changelog

d9845d7 update README
7346083 update README
e068f9d support multiple zone:device mappings
a700f38 test self-allowed-ips and self-endpoint config parsing
77622af add configuration support for self overrides
6f78170 serve self peer info
7d03ee7 standardize handler funcs
a928f85 serve allowed ips and public key via TXT RR
016a366 Update README for consistent name/target format
401ad4e always use full Service Instance Name
fd4b7d8 setup: on shutdown, close the client connection
ce78792 add build workflow