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/leven/readme.md

@@ -0,0 +1,50 @@
+# leven [![Build Status](https://travis-ci.org/sindresorhus/leven.svg?branch=master)](https://travis-ci.org/sindresorhus/leven)
+
+> Measure the difference between two strings<br>
+> One of the fastest JS implementations of the [Levenshtein distance](https://en.wikipedia.org/wiki/Levenshtein_distance) algorithm
+
+
+## Install
+
+```
+$ npm install leven
+```
+
+
+## Usage
+
+```js
+const leven = require('leven');
+
+leven('cat', 'cow');
+//=> 2
+```
+
+
+## Benchmark
+
+```
+$ npm run bench
+```
+
+```
+         165,926 op/s » leven
+         164,398 op/s » talisman
+           1,044 op/s » levenshtein-edit-distance
+             628 op/s » fast-levenshtein
+             497 op/s » levenshtein-component
+             195 op/s » ld
+             190 op/s » levenshtein
+             168 op/s » levdist
+              10 op/s » natural
+```
+
+
+## Related
+
+- [leven-cli](https://github.com/sindresorhus/leven-cli) - CLI for this module
+
+
+## License
+
+MIT © [Sindre Sorhus](https://sindresorhus.com)