Replace Jenkins to use circleci (mattermost#813)

.circleci/config.yml

@@ -0,0 +1,61 @@
+version: 2.1
+executors:
+  default:
+    working_directory: ~/mattermost-redux
+    docker:
+      - image: circleci/node:11.3.0
+
+jobs:
+  install:
+    executor:
+      name: default
+    steps:
+      - checkout
+      - run: ls -la
+      - restore_cache:
+          keys:
+            - test-dependencies-{{ checksum "package.json" }}
+
+      - run: npm install --ignore-scripts
+      - run: npm run flow-typed install
+      - run: ls -la
+      - save_cache:
+          paths:
+            - node_modules
+            - flow-typed
+          key: test-dependencies-{{ checksum "package.json" }}
+
+  lint:
+    executor:
+      name: default
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - test-dependencies-{{ checksum "package.json" }}
+      - run: npm run check
+      - run: npm run flow
+
+  test:
+    executor:
+      name: default
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - test-dependencies-{{ checksum "package.json" }}
+      - run: npm test
+      - store_test_results:
+          path: build/
+
+workflows:
+  version: 2
+  pr-build:
+    jobs:
+      - install
+      - lint:
+          requires:
+            - install
+      - test:
+          requires:
+            - lint

README.md

@@ -1,4 +1,4 @@
-# Mattermost Redux
+# Mattermost Redux ![CircleCI branch](https://img.shields.io/circleci/project/github/mattermost/mattermost-redux/master.svg)
 
 The project purpose is consolidating the storage, web utilities and logic of the webapp and React Native mobile clients into a single driver. We encourage you to use mattermost-redux to power your own Mattermost clients or integrations.
 

package.json

@@ -71,7 +71,7 @@
     "fix": "eslint --ignore-path .gitignore --ignore-pattern node_modules --quiet . --fix",
     "flow": "flow",
     "flow-typed": "flow-typed",
-    "test": "jest --forceExit --detectOpenHandles",
+    "test": "jest --forceExit --detectOpenHandles --maxWorkers=2",
     "test:watch": "jest --watch",
     "test:coverage": "jest --coverage",
     "prepare": "npm run build"