build: add circleci config (#95)

Author: CaerusKaru

.circleci/config.yml

@@ -0,0 +1,37 @@
+# Javascript Node CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-javascript/ for more details
+#
+version: 2
+jobs:
+  build:
+    docker:
+    # specify the version you desire here
+    - image: circleci/node:8.9
+
+    # Specify service dependencies here if necessary
+    # CircleCI maintains a library of pre-built images
+    # documented at https://circleci.com/docs/2.0/circleci-images/
+    # - image: circleci/mongo:3.4.4
+
+    working_directory: ~/repo
+
+    steps:
+    - checkout
+
+    # Download and cache dependencies
+    - restore_cache:
+        keys:
+        - v1-dependencies-{{ checksum "package.json" }}
+        # fallback to using the latest cache if no exact match is found
+        - v1-dependencies-
+
+    - run: npm install
+
+    - save_cache:
+        paths:
+        - node_modules
+        key: v1-dependencies-{{ checksum "package.json" }}
+
+    # run the build!
+    - run: npm run build