client fails to run inside docker about grpc-tls

[mipnw]

The following needs to be added to the final image in client/Dockerfile

ARG host
ARG port
ENV PORT=$port
ENV HOST=$host

to fix that issue. We also need to add the root CA certificate to the final image

COPY ./ca.cert /

So "-mode 3" will work.

Also the make run-docker-client target needs to be fixed, there seems to be a problem with the -id command line argument because

$ make run-docker-client 
docker run -t --rm --name my-client -e 1 client
invalid value "$ID" for flag -id: parse error

Instead one can start the client in docker manually, bypassing make

docker run -it --rm --name my-client client ./cli -id 1 -file ./ca.cert -mode 3

But this errors with

2020/09/17 18:31:26 Server says: rpc error: code = Unavailable desc = all SubConns are in TransientFailure, latest connection error: connection error: desc = "transport: Error while dialing dial tcp [EDITED]: i/o timeout"

This is after having edited the certificate.conf to set the CN to grpc.nleiva.com