Add readme

.gitlab-ci.yml

-lint:
+image: node:boron
+
+cache:
+  paths:
+  - node_modules/
+
+stages:
+  - build
+  - test
+  - deploy
+
+
+build:
+  stage: build
+  script:
+    - npm install
+  artifacts:
+    paths:
+      - node_modules/
+      #- dist/ # Generated during the server startup
+  tags:
+    - nodejs-app
+
+
+test:
+  stage: test
   script:
     - npm run lint
+  tags:
+    - nodejs-app
+
+
+deploy:
+  stage: deploy
+  script:
+    - echo "TODO: Deploy"
+  tags:
+    - nodejs-app

README.md

+# API Lab
+
+```
+npm i
+npm start
+```
+
+Documentation for the current routes is available at the root (automatically generated).
+
+```
+http://localhost:8000/
+```
+
+The swagger document is also served for reference.
+
+```
+http://localhost:8000/routes.yml
+```
+
+
+## Update Routes/Endpoints
+
+See `routes.yml` ([Swagger](http://swagger.io/specification/) document)
+
+
+### Initial mock data
+
+See `data.json` (Array of [Resource objects](https://github.com/BigstickCarpet/swagger-express-middleware/blob/master/docs/samples/walkthrough2.md#pre-populated-data))
+
+
+## Testing
+
+Currently only linting available for Swagger document `npm run lint`