config: disable overpass proxy probe by default

config.js

@@ -62,6 +62,14 @@ window.CONFIG = {
     debug: 0,                     // 1 = debug panel + progress logs in the console
     // debug: 1
     credits: false,               // attribution line hidden
+
+    // Optional same-origin Overpass proxy probe. The public Overpass mirrors
+    // work directly from the browser; keep this false unless the background
+    // nginx proxy is known to be reachable and you want cached same-origin calls.
+    overpass: {
+        useProxy: false,          // true = probe /overpass/... and use it when available
+        // useProxy: true
+    },
     // credits: false
     units: { temperature: 'C' },  // 'F' for Fahrenheit
     // units: { temperature: 'F' }