Angular 5 and Service Worker: How to exclude a particular path from ngsw-config.json

Question

I have ngsw-config.json (taken from the docs):

    {
      "index": "/index.html",
      "assetGroups": [{
        "name": "app",
        "installMode": "prefetch",
        "resources": {
          "files": [
            "/favicon.ico",
            "/index.html"
          ],
          "versionedFiles": [
            "/*.bundle.css",
            "/*.bundle.js",
            "/*.chunk.js"
          ]
        }
      }, {
        "name": "assets",
        "installMode": "lazy",
        "updateMode": "prefetch",
        "resources": {
          "files": [
            "/assets/**"
          ]
        }
      }]
    }

On my site there is a link to the RSS feed /api/rss, which should open in a new browser tab without loading Angular app. How can I exclude it from a list of resources whose request is redirected to index.html?

UPD: I tried but not working the following config (see !/api/rss):

    {
      "index": "/index.html",
      "assetGroups": [{
        "name": "app",
        "installMode": "prefetch",
        "patterns": ["!/api/rss"],
        "resources": {
          "files": [
            "/favicon.ico",
            "/index.html",
            "!/api/rss"
          ],
          "versionedFiles": [
            "/*.bundle.css",
            "/*.bundle.js",
            "/*.chunk.js"
          ]
        }
      }, {
        "name": "assets",
        "installMode": "lazy",
        "updateMode": "prefetch",
        "resources": {
          "files": [
            "/assets/**"
          ]
        }
      }]
    }

Answer 1

Thanks to the Pedro Arantes advice, I reached the next working config (see dataGroups and "maxAge": "0u"):

{
  "index": "/index.html",
  "dataGroups":
  [
    {
      "name": "api",
      "urls": ["/api"],
      "cacheConfig": {
        "maxSize": 0,
        "maxAge": "0u",
        "strategy": "freshness"
      }
    }
  ],
  "assetGroups":
  [
    {
      "name": "app",
      "installMode": "prefetch",
      "resources": {
        "files": [
          "/favicon.ico",
          "/index.html"
        ],
        "versionedFiles": [
          "/*.bundle.css",
          "/*.bundle.js",
          "/*.chunk.js"
        ]
      }
    },
    {
      "name": "assets",
      "installMode": "lazy",
      "updateMode": "prefetch",
      "resources": {
        "files": [
          "/assets/**"
        ]
      }
    }
  ]
}