code good so far

database.js

@@ -43,7 +43,7 @@ let close = () => {
     });
 }
 
-let main = async () => {
+/* let main = async () => {
     query('insert into log (message) values (\'Outside\')');
     let rows = null;
     try {
@@ -56,14 +56,21 @@ let main = async () => {
     } catch (ex) {
         console.error('Error', ex);
     }
+}
+
+main(); */
+
+let exitHandler = (eventType) => {
+    console.log("DB-Cleaning up (" + eventType + ")");
     close();
 }
 
-main();
-
+// make sure we close the DB in case the process ends.
+[`exit`, `SIGINT`, `SIGUSR1`, `SIGUSR2`, `uncaughtException`, `SIGTERM`].forEach((eventType) => {
+    process.on(eventType, exitHandler.bind(null, eventType));
+  })
 
 
 module.exports = {
-    query,
-    close
+    query
 };