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-source-maps/README.md

@@ -0,0 +1,11 @@
+# istanbul-lib-source-maps
+
+[![Build Status](https://travis-ci.org/istanbuljs/istanbuljs.svg?branch=master)](https://travis-ci.org/istanbuljs/istanbuljs)
+
+Source map support for istanbuljs.
+
+## Debugging
+
+_istanbul-lib-source-maps_ uses the [debug](https://www.npmjs.com/package/debug) module.
+Run your application with the environment variable `DEBUG=istanbuljs`, to receive debug
+output.