Basic Circle Configuration

config.yml

# Check https://circleci.com/docs/2.0/language-javascript/ for more details
version: 2.1

jobs:
  # Job #1
  build:
    # The primary container is an instance of the first image listed. The job's commands run in this container.
    docker:
      # specify the version you desire here
      - image: circleci/node:11.10
    working_directory: ~/app
    steps:
      - checkout
      # cache dependencies (to speed automation process)
      - restore_cache:
          keys:
            - v1-dependencies-{{ checksum "package.json" }}
            # fallback to using the latest cache if no exact match is found
            - v1-dependencies-
      - run:
          name: Install NPM dependencies - via yarn
          command: yarn install
      - run:
          name: Build Production Assets
          command: yarn run build
      - persist_to_workspace:
          # Must be an absolute path, or relative path from working_directory. This is a directory on the container which is 
          # taken to be the root directory of the workspace.
          root: ~/app
          # Must be relative path from root
          paths:
            - node_modules  # contain dependencies 
      - save_cache:
          paths:
            - node_modules
          key: v1-dependencies-{{ checksum "package.json" }}