Restrict data service ports to localhost

.env.example

@@ -45,7 +45,11 @@ TRAVEL_KG_EXPORT_ROOT=./data/exports
 TRAVEL_KG_ENV_PATH=./.env
 
 # Docker host ports
+API_HOST_BIND=0.0.0.0
 API_PORT=8102
+POSTGRES_HOST_BIND=127.0.0.1
 POSTGRES_PORT=5433
+FALKORDB_HOST_BIND=127.0.0.1
 FALKORDB_PORT=6380
+FALKORDB_BROWSER_HOST_BIND=127.0.0.1
 FALKORDB_BROWSER_PORT=3002