Nexus OSS & npm audit with nginx

nginx.conf - server block

Have private npm registry and proxying through registry.npmjs.org with Nexus? Still want to be able to transparently `npm audit`?

This might help.

```
  server {
    listen 443 ssl http2;

    server_name nginx.some.domain;

    ssl_certificate     /etc/nginx/tls-certificate.pem;
    ssl_certificate_key /etc/nginx/tls-key.pem;

    set $proxy_pass_url      https://nexus.some.domain:443;

    location / {
      proxy_ssl_server_name  on;
      proxy_ssl_name         nexus.some.domain;
      proxy_set_header       Host nexus.some.domain;
      proxy_pass             $proxy_pass_url;
      proxy_redirect         https?://nexus.some.domain https://$host;
    }

    # Nexus OSS does not support npm audit, thus pass it to the public
    # npm registry. HTTP/307 is basically a redirect that allows POST.
    #
    # For this the following two URIs are necessary:
    #   /repository/<your nexus npm proxy>/-/npm/v1/security/audits/quick
    #   /repository/<your nexus npm proxy>/-/npm/v1/security/advisories/bulk
    location ~ ^/repository/<your nexus npm proxy>/(-/npm/v1/security/audits/quick)$ {
       return 307 https://registry.npmjs.org/$1;
    }
    location ~ ^/repository/<your nexus npm proxy>/(-/npm/v1/security/advisories/bulk)$ {
       return 307 https://registry.npmjs.org/$1;
    }
  }
```