[verified] refactor: establish service and frontend boundaries

server/proxy/routes.js

@@ -0,0 +1,14 @@
+import { proxyToInstance } from './service.js'
+
+export function registerProxyRoutes(app, { findClient, proxy = proxyToInstance }) {
+  app.all('/api/proxy/:id/*', async (request, reply) => {
+    const client = findClient(request.params.id, reply)
+    if (!client) return
+    try { return await proxy({ client, request, reply, rest: request.params['*'] }) }
+    catch (error) {
+      if (/invalid proxy path/.test(error.message)) return reply.code(400).send({ error: error.message })
+      if (error.statusCode === 415) return reply.code(415).send({ error: error.message })
+      throw error
+    }
+  })
+}