fix: use just gauge metric type for delays (#51)

- because histogram would need more data to be provided

Increase NET_READ_BUFFER_SIZE to 512 bytes and use std::size_t instea…

…d of size_t in SSLConnection

feat: start returning metric types in Prometheus response (#48)

Co-authored-by: michal-drobniak <[email protected]>

Implement EVENTLOG command (#45)

Initial rate limit functionality. (#43)

Add enable_kvstore option to example config.

Fix race condition when setting up handlers.

onHTTPRequest and onWebsocketRequest handlers was initialized after the
client was added to epoll. This might cause a raceconditon where we try
to parse a client request before it has an assigned handler. When this
happens a std::bad_function_call is thrown. Fixed by setting up the
handlers before adding the client to our epoll set.

Be more consistent about consting variables that can be immmutable. (#39

)

Enable SSE in docker-compose example.