Update README.md

Author: erikap

README.md

@@ -1,6 +1,6 @@
-# mu-javascript-template
+# Mu Javascript template
 
-Template for writing mu.semte.ch services in JavaScript
+Template for writing mu.semte.ch services in JavaScript using [Express 4](https://expressjs.com/)
 
 ## Getting started
 
@@ -9,7 +9,7 @@ Create a new folder.  Add the following Dockerfile:
     FROM semtech/mu-javascript-template
     MAINTAINER Aad Versteden <[email protected]>
 
-Create your microservice:
+Create your microservice in `app.js`:
 
     import { app, query } from 'mu';
 
@@ -35,18 +35,22 @@ Create your microservice:
           res.send( "Oops something went wrong: " + JSON.stringify( err ) );
         });
     } );
+
+Check [Express' Getting Started guide](https://expressjs.com/en/starter/basic-routing.html) to learn how to build a REST API in Express.
 
 ## Requirements
 
-  - **database link**: You need a link to the `database` which exposes a sparql endpoint on `http://database:8890/sparql`.  In line with other microservices.
+  - **database link**: You need a link to the `database` which exposes a SPARQL endpoint on `http://database:8890/sparql`.  In line with other microservices.
 
 ## Imports
 
 The following importable variables are available:
 
-  - `app`: The application on which routes can be added
+  - `app`: The [Express application](https://expressjs.com/en/guide/routing.html) on which routes can be added
   - `query(query) => Promise`: Function for sending queries to the triplestore
   - `update(query) => Promise`: Function for sending updates to the triplestore
+  - `uuid()` => string: Generates a random UUID
+  - `sparql`: [Template tag](https://www.npmjs.com/package/sparql-client-2#using-the-sparql-template-tag) to create queries with interpolated values
 
 You can either import specific attributes from the mu library, or import the whole mu object.
 
@@ -66,11 +70,15 @@ An example of importing the whole library:
       res.send('Hello using full import');
     } );
 
+## Dependencies
+
+You can install additional dependencies by including a `package.json` file next to your `app.js`. It works as you would expect: just define the packages in the `dependencies` section of the `package.json`. They will be installed automatically at build time. 
+
 ## Developing with the template
 
-When developing, you can use the template image, mount the volume with your sources on `/app` and add a link to the database.
+When developing, you can use the template image, mount the volume with your sources on `/app` and add a link to the database. The service will live-reload on changes. You'll need to restart the container when you define additional dependencies in your `package.json`.
 
-    dr run --link virtuoso:database \
+    docker run --link virtuoso:database \
            -v `pwd`:/app \
            -p 8888:80 \
            --name my-js-test \