Ref: https://www.udemy.com/course/grpc-golang
https://grpc.io/docs/languages/go/quickstart/#prerequisites
For more information about what are the rules defined in the Makefile, please type:
make help
https://github.com/ktr0731/evans
evans --host localhost --port 50051 --reflection repl
Could not greet: rpc error: code = Unavailable desc = connection error: desc = "transport: authentication handshake failed: x509: certificate signed by unknown authority (possibly because of "x509: cannot verify signature: insecure algorithm SHA1-RSA (temporarily override with GODEBUG=x509sha1=1)" while trying to verify candidate authority certificate "ca")"
GODEBUG=x509sha1=1 ./bin/greet/client