chore(CI): enable caching of node_modules for faster builds (#253)

Author: tkrugg

.circleci/config.yml

@@ -16,12 +16,21 @@ commands:
         type: string
         default: ""
     steps:
+      - restore_cache:
+          name: Restore Yarn Package Cache for << parameters.path >>
+          keys:
+            - yarn-packages-{{ checksum "<< parameters.path >>/yarn.lock" }}
       - run:
           name: "Building << parameters.path >>"
           command: |
             cd "<< parameters.path >>"
             yarn
             yarn build
+      - save_cache:
+          name: Save Yarn Package Cache for << parameters.path >>
+          key: yarn-packages-{{ checksum "<< parameters.path >>/yarn.lock" }}
+          paths:
+            - ./<< parameters.path >>/node_modules
 jobs:
   build_angular_projects:
     executor: node14