Added chache header for serice worker. [skip ci]

ops/helm/nomad/templates/gui-deployment.yml

@@ -17,6 +17,12 @@ data:
         rewrite ^{{ .Values.proxy.external.path }}/gui/(.*)$ /nomad/$1 break;
         try_files $uri {{ .Values.proxy.external.path }}/gui/index.html;
       }
+      location {{ .Values.proxy.external.path }}/gui/service-worker.js {
+        root      /app/;
+        rewrite ^{{ .Values.proxy.external.path }}/gui/(.*)$ /nomad/$1 break;
+        more_clear_headers "Cache-Control";
+        add_header Cache-Control "public, max-age=60, s-maxage=60";
+      }
     }
   env.js: |
     window.nomadEnv = {