Users SBAT continue following "getting started" documentation after starting proxy

[clrblmt]

Expected Behavior

Add screen instruction

Current Behavior

No instruction in documentation on how to continue typing commands after running:
docker run --name celo-proxy --restart always -p 8545:8545 -p 8546:8546 -p 30303:30303 -p 30303:30303/udp -p 30503:30503 -p 30503:30503/udp -v $PWD/proxy:/root/.celo $CELO_IMAGE --verbosity 3 --networkid $NETWORK_ID --syncmode full --rpc --rpcaddr 0.0.0.0 --rpcapi eth,net,web3,debug --maxpeers 1100 --etherbase=$CELO_PROXY_ADDRESS --proxy.proxy --proxy.proxiedvalidatoraddress $CELO_VALIDATOR_ADDRESS --proxy.internalendpoint :30503