There are several small apps: client, servers using grpc.
Generate protobuf files:
make greet
Open first console is for running server:
./bin/greet/server
Open second console is for running client:
./bin/greet/client
Generate protobuf files:
make calculator
Open first console is for running server:
./bin/calculator/server
Open second console is for running client:
./bin/calculator/client