github.com/improbable-eng/grpc-web
docker run --net="host" -v ${PWD}/certs:/certs --rm -it jfyne/docker-grpcwebproxy \
/grpcwebproxy \
--server_tls_cert_file=/certs/localhost.crt \
--server_tls_key_file=/certs/localhost.key \
--backend_addr=localhost:8800 \
--backend_tls_noverify