Allow changing of root subdirectory

So that the app can be deployed anywhere! Just change the
environment variable `CHIPCHOC_BASE_URL` and you're all set 😉

.sample-env

@@ -3,3 +3,4 @@ CHIPCHOC_EMAIL_PORT=587
 CHIPCHOC_EMAIL_SECURE=false
 CHIPCHOC_EMAIL_USER=user@example.com
 CHIPCHOC_EMAIL_PASSWORD=badexample
+CHIPCHOC_BASE_URL=/

README.md

@@ -23,6 +23,7 @@ CHIPCHOC_EMAIL_PORT=587
 CHIPCHOC_EMAIL_SECURE=false
 CHIPCHOC_EMAIL_USER=user@example.com
 CHIPCHOC_EMAIL_PASSWORD=badexample
+CHIPCHOC_BASE_URL=/
 ```
 
 ...then start [Rollup](https://rollupjs.org):

server.js

@@ -3,6 +3,7 @@ const nodemailer = require('nodemailer')
 
 require('dotenv').config()
 
+// handle debug mode
 let DEBUG
 
 if (process.env.DEBUG || process.env.CHIPCHOC_DEBUG) {
@@ -25,9 +26,15 @@ const perumal = nodemailer.createTransport({
   },
 })
 
+// decide base url for app (can be configured)
+let baseUrl = process.env.CHIPCHOC_BASE_URL || '/'
+
 const app = express()
 var expressWs = require('express-ws')(app)
 
+const router = express.Router()
+app.use(baseUrl, router)
+
 const port = process.env.CHIPCHOC_PORT || 5000
 
 const cors = require('cors')
@@ -35,7 +42,7 @@ const path = require('path')
 
 app.use(cors())
 
-app.get('/air', (req, res) => {
+router.get('/air', (req, res) => {
   console.log(`Searching for contacts with the term: ${req.query.name}`)
   res.send({
     success: true,
@@ -44,7 +51,7 @@ app.get('/air', (req, res) => {
 })
 
 
-app.ws('/hit-send', (ws, request) => {
+router.ws('/hit-send', (ws, request) => {
   console.log('Hitting send on some emails!')
 
   ws.on('message', async (message) => {
@@ -92,7 +99,7 @@ app.ws('/hit-send', (ws, request) => {
 })
 
 app.use(express.static('public'))
-app.get('/', (req, res) => {
+router.get('/', (req, res) => {
   res.sendFile(path.resolve(__dirname, 'public', 'index.html'))
 })