Replace node with babel-node

This should ensure that you don't have to reubild the server all the
time

README.md

@@ -137,15 +137,7 @@ npm run db:reset
 
 **Beware**: We have no multiple database setup at the moment. We clean the database after each test, running the tests will wipe out all your data!
 
-First build `server.js`:
-```bash
-yarn run build
-# -or-
-npm run build
-```
-The additional build step will become obsolete, as soon as [jest transforms global setup teardown modules](https://github.com/facebook/jest/issues/5164).
-
-Now run the tests:
+Run the tests:
 ```bash
 yarn run test
 # -or-

src/jest/hooks.js

@@ -5,14 +5,14 @@ let server
 let seeder
 
 const setup = async function () {
-  server = spawn('node', ['dist/'], {
+  server = spawn('babel-node', ['src/index'], {
     env: Object.assign({}, process.env, {
       GRAPHQL_URI: 'http://localhost:4123',
       GRAPHQL_PORT: '4123'
     })
   })
 
-  seeder = spawn('node', ['dist/'], {
+  seeder = spawn('babel-node', ['src/index'], {
     env: Object.assign({}, process.env, {
       GRAPHQL_URI: 'http://localhost:4001',
       GRAPHQL_PORT: '4001',