👷 Create CircleCI config

👷 Create CircleCI config

.circleci/config.yml

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+version: 2.1
+# --- Constants --- #
+
+globals:
+  images:
+    node: &node cimg/node:lts
+    postgres: &postgres circleci/postgres:9.6.5
+  caches:
+    dependencies: &dependencies dependencies-{{ checksum "package.json" }}
+
+# --- Commands --- #
+
+commands:
+  setup_dependencies:
+    description: Setup the environment
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - *dependencies
+
+# --- Jobs definitions --- #
+
+jobs:
+  build: &shared-config
+    docker:
+      - image: *node
+    working_directory: ~/app
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - *dependencies
+            # fallback to using the latest cache if no exact match is found
+            - dependencies-
+      - run: yarn install
+      - save_cache:
+          paths:
+            - node_modules
+          key: *dependencies
+  test:
+    <<: *shared-config
+    steps:
+      - setup_dependencies
+      - run: yarn test
+
+  test-e2e:
+    <<: *shared-config
+    docker:
+      - image: *node
+      - image: *postgres
+        environment:
+          POSTGRES_DB: postgres
+          POSTGRES_USER: postgres
+          POSTGRES_PASSWORD: postgres
+    steps:
+      - setup_dependencies
+      - run:
+          command: yarn test:e2e
+          environment:
+            DATABASE_URL: postgres://postgres:postgres@localhost:5432/postgres
+
+  lint:
+    <<: *shared-config
+    steps:
+      - setup_dependencies
+      - run:
+          name: Check files format
+          command: yarn format:check
+
+      - run:
+          name: Lint files
+          command: yarn lint
+
+# --- Workflow definition --- #
+
+workflows:
+  version: 2
+  build-test-and-lint:
+    jobs:
+      - build
+      - test:
+          requires:
+            - build
+      - test-e2e:
+          requires:
+            - build
+      - lint:
+          requires:
+            - build