server: Added resilience to trust proxy resolution to handle IP changes and bad start order.

server.js

@@ -33,20 +33,33 @@ if (config.trustedProxy != null) {
 
     console.log("Trusting proxy", config.trustedProxy);
   } else {
+    let trusted = null
+
+    setInterval(() => {
       dns.resolve4(config.trustedProxy, (err, res) => {
         if (err != null) {
+          if (trusted === null) {
             console.error("Failed to resolve trustedProxy hostname")
-        console.error(err)
-        process.exit(1)
+          }
+          
+          return
         }
         if (res.length === 0) {
+          if (trusted === null) {
             console.error("No results for trustedProxy hostname")
-        process.exit(1)
           }
           
+          return
+        }
+  
+        if (trusted !== res[0]) {
           console.log("Trusting proxy", res[0], `(${config.trustedProxy})`);
           app.set('trust proxy', res[0])
+        
+          trusted = res[0]
+        }
       })
+    }, 1000)
   }
 }