chore: add proper integ tests to hello-world project

examples/hello-world/services/hello-container/Dockerfile

@@ -3,8 +3,9 @@ FROM node:9-alpine
 ENV PORT=8080
 EXPOSE ${PORT}
 
+RUN npm install
+
 ADD . /app
 WORKDIR /app
 
-RUN npm install
 CMD ["npm", "start"]

examples/hello-world/services/hello-container/index.js → examples/hello-world/services/hello-container/app.js

@@ -1,5 +1,5 @@
-const express = require("express")
 const request = require("request-promise")
+const express = require("express")
 
 const app = express()
 
@@ -8,12 +8,12 @@ const functionEndpoint = process.env.GARDEN_SERVICES_HELLO_FUNCTION_ENDPOINT
 app.get("/hello", (req, res) => {
   // Query the example cloud function and return the response
   request.get(functionEndpoint)
-    .then(response => {
-      res.send(response + "\n")
+    .then(message => {
+      res.json({ message })
     })
     .catch(() => {
       res.statusCode = 500
-      res.send("Unable to reach function at " + functionEndpoint + "\n")
+      res.json({ error: "Unable to reach function at " + functionEndpoint })
     })
 })
 
@@ -22,4 +22,4 @@ app.get("/_ah/health", (req, res) => {
   res.sendStatus(200)
 })
 
-app.listen(process.env.PORT, "0.0.0.0", () => console.log("App started"))
+module.exports = { app }

examples/hello-world/services/hello-container/main.js

@@ -0,0 +1,3 @@
+const { app } = require("./app")
+
+app.listen(process.env.PORT, "0.0.0.0", () => console.log("App started"))