Add cache for building

Author: marcin-wosinek

.circleci/config.yml

@@ -21,4 +21,10 @@ jobs:
           key: ng-project-{{ .Branch }}-{{ checksum "package-lock.json" }}
           paths:
             - "node_modules"
+      - restore_cache:
+          key: ng-cache-{{ .Branch }}-{{ checksum "package-lock.json" }}
       - run: npm run build
+      - save_cache:
+          key: ng-cache-{{ .Branch }}-{{ checksum "package-lock.json" }}
+          paths:
+            - ".angular/cache"

angular.json

@@ -94,5 +94,11 @@
         }
       }
     }
+  },
+  "cli": {
+    "cache": {
+      "enabled": true,
+      "environment": "all"
+    }
   }
 }