fix: Update nginx config to use dynamic DNS resolution

- Replace upstream blocks with resolver directive
- Use variables for backend addresses to avoid startup errors
- Simplify configuration with single server block
- Add health check endpoint

server/api/node_modules/istanbul-lib-coverage/lib/data-properties.js

@@ -0,0 +1,12 @@
+'use strict';
+
+module.exports = function dataProperties(klass, properties) {
+    properties.forEach(p => {
+        Object.defineProperty(klass.prototype, p, {
+            enumerable: true,
+            get() {
+                return this.data[p];
+            }
+        });
+    });
+};