feat: scaffold Hono server with auth and health check

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

server/src/auth.ts

@@ -0,0 +1,11 @@
+import { betterAuth } from "better-auth";
+import { apiKey } from "better-auth/plugins";
+import { drizzleAdapter } from "better-auth/adapters/drizzle";
+import { db } from "./db.js";
+
+export const auth = betterAuth({
+  database: drizzleAdapter(db, {
+    provider: "pg",
+  }),
+  plugins: [apiKey()],
+});

server/src/db.ts

@@ -0,0 +1,6 @@
+import { drizzle } from "drizzle-orm/postgres-js";
+import postgres from "postgres";
+import { env } from "./env.js";
+
+const client = postgres(env.DATABASE_URL);
+export const db = drizzle(client);

server/src/env.ts

@@ -0,0 +1,9 @@
+export const env = {
+  DATABASE_URL: process.env.DATABASE_URL!,
+  PORT: parseInt(process.env.PORT || "8080"),
+  CORS_ORIGIN: process.env.CORS_ORIGIN || "http://localhost:5173",
+};
+
+if (!env.DATABASE_URL) {
+  throw new Error("DATABASE_URL is not set");
+}

server/src/index.ts

@@ -0,0 +1,44 @@
+import { Hono } from "hono";
+import { cors } from "hono/cors";
+import { auth } from "./auth.js";
+import { env } from "./env.js";
+
+const app = new Hono();
+
+// CORS for dashboard
+app.use(
+  "*",
+  cors({
+    origin: env.CORS_ORIGIN,
+    allowHeaders: ["Content-Type", "Authorization"],
+    allowMethods: ["GET", "POST", "PUT", "DELETE", "OPTIONS"],
+    credentials: true,
+  })
+);
+
+// Better Auth handler
+app.on(["POST", "GET"], "/api/auth/*", (c) => {
+  return auth.handler(c.req.raw);
+});
+
+// Health check
+app.get("/health", (c) => c.json({ status: "ok" }));
+
+// Start server with WebSocket support
+const server = Bun.serve({
+  port: env.PORT,
+  fetch: app.fetch,
+  websocket: {
+    open(ws) {
+      console.log("WebSocket connected");
+    },
+    message(ws, message) {
+      // placeholder — Task 4 implements device/dashboard handlers
+    },
+    close(ws) {
+      console.log("WebSocket disconnected");
+    },
+  },
+});
+
+console.log(`Server running on port ${server.port}`);