support google map api key replacement

overviewer/run-overviewer.sh

@@ -2,11 +2,16 @@
 
 SLEEP=${1}
 
+function update_map() {
   overviewer.py --config=/config.py
+  sed -i "s/sensor=false/key=${GOOGLE_MAPS_API_KEY}\&sensor=false/" /map/index.html
+}
+
+update_map
 
 while [ ! -z ${SLEEP} ] ; do
   while [ true ] ; do
     sleep ${SLEEP}
-    overviewer.py --config=/config.py
+    update_map
   done
 done