first commit

backend/src/server.ts

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+import Fastify from "fastify";
+import cors from "@fastify/cors";
+import fastifyStatic from "@fastify/static";
+import path from "node:path";
+import { fileURLToPath } from "node:url";
+import { systemsRoutes } from "./routes/systems.js";
+import { structuresRoutes } from "./routes/structures.js";
+import { quizRoutes } from "./routes/quiz.js";
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const MODELS_DIR = process.env.MODELS_DIR ?? path.resolve(__dirname, "../models");
+
+const app = Fastify({ logger: true });
+
+await app.register(cors, { origin: true });
+
+await app.register(fastifyStatic, {
+  root: MODELS_DIR,
+  prefix: "/models/",
+  decorateReply: false,
+  immutable: true,
+  maxAge: "7d",
+});
+
+app.get("/api/health", async () => ({ status: "ok" }));
+
+await app.register(systemsRoutes);
+await app.register(structuresRoutes);
+await app.register(quizRoutes);
+
+const port = Number(process.env.PORT ?? 3333);
+app
+  .listen({ port, host: "0.0.0.0" })
+  .catch((err) => {
+    app.log.error(err);
+    process.exit(1);
+  });