Merge pull request #4 from nkuba/ci-config

CI config

Author: nkuba

.circleci/config.yml

@@ -0,0 +1,35 @@
+# Javascript Node CircleCI 2.0 configuration file
+#
+# Check https://circleci.com/docs/2.0/language-javascript/ for more details
+#
+version: 2
+
+jobs:
+  build:
+    docker:
+      - image: circleci/node:11
+
+    steps:
+      - checkout
+
+      # Download and cache dependencies.
+      - restore_cache:
+          keys:
+            # Find a cache corresponding to this specific package-lock.json checksum
+            # when this file is changed, this key will fail
+            - v1-npm-deps-{{ checksum "package-lock.json" }}
+            # Find the most recently generated cache used from any branch
+            - v1-npm-deps-
+
+      - run: npm install
+
+      - save_cache:
+          key: v1-npm-deps-{{ checksum "package-lock.json" }}
+          paths:
+            - node_modules
+
+      # Run linting verification.
+      - run: npm run lint
+
+      # Run tests.
+      - run: npm test

README.md

@@ -2,6 +2,12 @@
 
 Electrum Protocol Client for Node.js
 
+## Continuous Integration
+
+Latest [CircleCI](.circleci/) build status:
+
+[![CircleCI](https://circleci.com/gh/nkuba/electrum-client-js.svg?style=svg)](https://circleci.com/gh/nkuba/electrum-client-js)
+
 ## what is this
 
 https://electrum.org/
@@ -45,5 +51,3 @@ const main = async () => {
 }
 main()
 ```
-
-