Merge branch '299-what-happened-to-the-service-workers' into 'master'

Fix service worker

Closes #299

See merge request !254

ngsw-config.json

@@ -15,7 +15,7 @@
     {
       "name": "static",
       "urls": [
-        "!/**/*api*"
+        "!/**/*api*/**"
       ],
       "cacheConfig": {
         "strategy": "performance",