[DEPLOY] Update template env file to require Google Maps API key

deploy/deploy-docker/example.env

@@ -6,6 +6,11 @@ SECRET_KEY=changeme
 # The password for the breccia-mapper user in the postgres database
 DB_PASSWORD=changeme
 
+# REQUIRED=Google Maps API key
+# Google Maps API key to display maps of people's locations - required to enable map functionality
+# Default: None
+# GOOGLE_MAPS_API_KEY=None
+
 # Debug
 # Should the server run in debug mode?  Provides information to users which is unsafe in production
 # Default: False
@@ -127,8 +132,3 @@ DEBUG=False
 # Cannot be enabled at the same time as EMAIL_USE_TLS
 # Default: True if EMAIL_PORT == 465 else False
 # EMAIL_USE_SSL=True if EMAIL_PORT == 465 else False
-
-# Google Maps API key
-# Google Maps API key to display maps of people's locations
-# Default: None
-# GOOGLE_MAPS_API_KEY=None