Add error message to log if database cannot be reached

Signed-off-by: Tilman Vatteroth <git@tilmanvatteroth.de>

app.js

@@ -291,9 +291,9 @@ function syncAndListen () {
         process.exit(1)
       }
     })
-  }).catch(() => {
+  }).catch((dbError) => {
     if (currentDBTry < maxDBTries) {
-      logger.warn(`Database cannot be reached. Try ${currentDBTry} of ${maxDBTries}.`)
+      logger.warn(`Database cannot be reached. Try ${currentDBTry} of ${maxDBTries}. (${dbError})`)
       currentDBTry++
       setTimeout(function () {
         syncAndListen()

public/docs/release-notes.md

@@ -7,6 +7,7 @@
 
 ### Enhancements
 - Libravatar avatars render as ident-icons when no avatar image was uploaded to Libravatar or Gravatar
+- Add database connection error message to log output
 
 ## <i class="fa fa-tag"></i> 1.9.2 <i class="fa fa-calendar-o"></i> 2021-12-03