I’m trying to build something similar to facebook live. Is this this right package to do so?
Honestly I have no clue, didn’t play with streaming much. There is support for streaming, see https://echo.labstack.com/cookbook/streaming-response but whether that is suitable for what you’re trying to do, no idea.
No. If you’re looking for something similar to facebook live (that uses RTMP) I would just build nginx from source with nginx-rtmp-module.