adjusting networks for certbot so that we can talk to the right containers

dockerfiles/services/sslproxy/cli/exec

@@ -1,9 +1,22 @@
 #!/usr/bin/env bash
-set -e
+set -ex
 
 export DOCKER_HOST=${DOCKER_HOST:-'dkhost:2376'}
 
 container=$(docker ps -qn1)
+
+while getopts c: name
+do
+    case $name in
+      c)
+        container=$OPTARG
+        ;;
+      *)
+        ;;
+    esac
+done
+shift $((OPTIND -1))
+
 # shellcheck disable=SC2068
 docker exec -it "$container" $@
 #docker network inspect ingress