Fix entrypoint for server image

docker/server/entry.sh

@@ -1,3 +1,21 @@
 #!/bin/bash
-node /opt/server/index.js &
+echo "Starting flask..."
 python /opt/cnn_model/app.py &
+
+echo "Starting node..."
+node /opt/server/index.js &
+
+while /bin/true; do
+  ps aux |grep app.py |grep -q -v grep
+  PROCESS_1_STATUS=$?
+  ps aux |grep index.js |grep -q -v grep
+  PROCESS_2_STATUS=$?
+
+  # If the greps above find anything, they will exit with 0 status
+  # If they are not both 0, then something is wrong
+  if [ $PROCESS_1_STATUS -ne 0 -o $PROCESS_2_STATUS -ne 0 ]; then
+    echo "Process exit."
+    exit -1
+  fi
+  sleep 60
+done