Add ElysiaJS integration and update homepage

server/index.ts

@@ -0,0 +1,4 @@
+import Elysia, { t } from "elysia";
+import { health } from "./modules/health";
+
+export const app = new Elysia({ prefix: "/api" }).use(health);

server/modules/health/index.ts

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+import { Elysia } from "elysia";
+
+import { HealthModel } from "./model";
+import { Health } from "./service";
+
+export const health = new Elysia({ prefix: "/health" }).get(
+  "/",
+  () => Health.check(),
+  { response: HealthModel.checkResponse },
+);

server/modules/health/model.ts

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+import { t, type UnwrapSchema } from "elysia";
+
+export const HealthModel = {
+  checkResponse: t.Object({
+    status: t.Literal("ok"),
+  }),
+} as const;
+
+export type HealthModel = {
+  [k in keyof typeof HealthModel]: UnwrapSchema<(typeof HealthModel)[k]>;
+};

server/modules/health/service.ts

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+import { HealthModel } from "./model";
+
+export abstract class Health {
+  static async check() {
+    return {
+      status: "ok",
+    } satisfies HealthModel["checkResponse"];
+  }
+}