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/undefsafe/.jscsrc

@@ -0,0 +1,13 @@
+{
+  "preset": "node-style-guide",
+  "requireCapitalizedComments": null,
+  "requireSpacesInAnonymousFunctionExpression": {
+    "beforeOpeningCurlyBrace": true,
+    "beforeOpeningRoundBrace": true
+  },
+  "disallowSpacesInNamedFunctionExpression": {
+    "beforeOpeningRoundBrace": true
+  },
+  "excludeFiles": ["node_modules/**"],
+  "disallowSpacesInFunction": null
+}