Minor fixes to the devapp compose

- rename server to avoid conflict
- add better logging message

examples/em-phone-devapp-serve/docker-compose.yml

@@ -1,6 +1,6 @@
 version: "3"
 services:
-  web-server:
+  devapp-server:
     image: emission/e-mission-phone.dev.ui-only:latest
     environment:
       - PHONE_REPO=https://github.com/e-mission/e-mission-phone.git

start_devapp_serve.sh

@@ -1,8 +1,8 @@
 #!/usr/bin/env bash
 #Configure web server
 
-#set database URL using environment variable
-echo "Cloning from repo "${PHONE_REPO}
+#set phone repo using environment variable
+echo "Cloning from repo "${PHONE_REPO}" and branch "$PHONE_BRANCH
 
 mkdir -p /src
 cd /src