[Wheelmap] service rewrite and tests (#2486)

scripts/export-heroku-secrets-cli.js

@@ -0,0 +1,19 @@
+'use strict'
+
+const fs = require('fs')
+const path = require('path')
+
+const secretsPath = path.join(__dirname, '..', 'private', 'secret.json')
+
+if (fs.existsSync(secretsPath)) {
+  console.log('Found existing private/secret.json, not overwriting.')
+} else {
+  console.log('private/secret.json does not exist, creating.')
+  const privatePath = path.dirname(secretsPath)
+  if (!fs.existsSync(privatePath)) {
+    fs.mkdirSync(privatePath)
+  }
+  const secrets = { wheelmap_token: process.env.WHEELMAP_TOKEN }
+  const secretsString = JSON.stringify(secrets)
+  fs.writeFileSync(secretsPath, secretsString)
+}