go install google.golang.org/protobuf/cmd/[email protected] go install google.golang.org/grpc/cmd/[email protected]

export PATH="$PATH:$(go env GOPATH)/bin"

protoc --go_out=. --go_opt=paths=source_relative \
    --go-grpc_out=. --go-grpc_opt=paths=source_relative \
     api/proto/adder.proto