Add "behind proxy" mode to use forwarded IP headers

main.go

@@ -67,10 +67,17 @@ func main() {
 
 	pongo2.RegisterFilter("time_diff", helpers.TemplTimeDiff)
 
-	app := fiber.New(fiber.Config{
+	fiberConfig := fiber.Config{
 		Views:        engine,
 		ErrorHandler: helpers.FiberErrorHandler,
-	})
+	}
+
+	// If app behind proxy, use headers for IP
+	if config.App.BehindProxy {
+		fiberConfig.ProxyHeader = fiber.HeaderXForwardedFor
+	}
+
+	app := fiber.New(fiberConfig)
 
 	if config.DevMode {
 		app.Static("/static", "./static")