dev-api: add developer portal, OpenAPI spec, and Flatenbadet case study

- New /developers/ page with API docs, SDKs, pricing, use cases
- OpenAPI 3.0 spec for Orders, Missions, Photos, Analytics
- Case study: Glasskiosken i Flatenbadet — complete ROI analysis
- Updated /order/ with recurring missions and frequency dropdown

services/frilans-payout/node_modules/siginfo/test.js

@@ -0,0 +1,16 @@
+var siginfo = require('.')
+var pkg = require('./package.json')
+
+var stop = siginfo(function () {
+  console.dir({
+    version: pkg.version,
+    uptime: process.uptime()
+  })
+})
+
+process.stdout.resume()
+
+setTimeout(function () {
+  stop()
+  process.exit(0)
+}, 2000)