The sane and even pleasant way of building back-ends. Just use stdlib (requests, contexts, middlewares are included).
Flask-like apps could be build very quickly while being compiled into native code and deployed as single executable (a.out)
Most of high traffic/low latency crypto stats sites have been built using Go. They just werkz.
Do not expose Go's https backends to the internet, just
proxy_pass requests by nginx which terminates TLS/SSL.