Have startLabkey also start rproxy network if not present

bin/startLabkey.sh

@@ -1,6 +1,8 @@
 #!/bin/bash
 
 . $(dirname $0)/env.sh
+docker network inspect ${DOCKER_NETWORK} >/dev/null 2>&1 || \
+    docker network create --driver bridge ${DOCKER_NETWORK}
 docker network create -d bridge --subnet=172.18.1.0/24 --ip-range=172.18.1.0/24 $NETWORK 
 $DOCKERCOMPOSE -f $COMPOSE up -d;