feat: add backend

apps/server/.gitignore

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+node_modules
+# Keep environment variables out of version control
+.env
+
+/generated/prisma

apps/server/app.ts

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+import Koa from 'koa';
+import { registerMiddlewares } from './middlewares/index.ts';
+
+const app = new Koa();
+
+registerMiddlewares(app);
+
+app.listen(3000, () => {
+  console.log('server started at http://localhost:3000');
+});

apps/server/controllers/application.ts

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+import type { Context } from 'koa';
+import prisma from '../libs/db.ts';
+
+export async function list(ctx: Context) {
+  const list = await prisma.application.findMany({
+    where: {
+      valid: 1,
+    },
+  });
+  ctx.body = list;
+}

apps/server/libs/db.ts

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+import { PrismaClient } from '../generated/prisma/index.js'
+
+const prismaClientSingleton = () => {
+  return new PrismaClient();
+};
+
+export default prismaClientSingleton();

apps/server/middlewares/index.ts

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+import { Router } from './router.ts';
+import { ResponseTime } from './responseTime.ts';
+import type Koa from 'koa';
+
+export function registerMiddlewares(app: Koa) {
+  const router = new Router();
+  const responseTime = new ResponseTime();
+  responseTime.apply(app);
+  router.apply(app);
+}

apps/server/middlewares/responseTime.ts

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+import type { Middleware } from './types.ts';
+import type Koa from 'koa';
+
+export class ResponseTime implements Middleware {
+  apply(app: Koa): void {
+    app.use(async (ctx, next) => {
+      const start = Date.now();
+      await next();
+      const ms = Date.now() - start;
+      ctx.set('X-Response-Time', `${ms}ms`);
+    });
+  }
+}

apps/server/middlewares/router.ts

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+import KoaRouter from '@koa/router';
+import type Koa from 'koa';
+import type { Middleware } from './types.ts';
+import * as application from '../controllers/application.ts';
+
+export class Router implements Middleware {
+  private router: KoaRouter;
+  constructor() {
+    this.router = new KoaRouter({
+      prefix: '/api',
+    });
+    this.router.get('/application/list', application.list);
+  }
+
+  apply(app: Koa) {
+    app.use(this.router.routes());
+    app.use(this.router.allowedMethods());
+  }
+}

apps/server/middlewares/types.ts

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+import type Koa  from 'koa';
+
+export abstract class Middleware {
+  abstract apply(app: Koa, options?: unknown): void;
+}

apps/server/package.json

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+{
+  "name": "server",
+  "version": "1.0.0",
+  "description": "",
+  "scripts": {
+    "dev": "tsx watch ./app.ts"
+  },
+  "keywords": [],
+  "type": "module",
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "@koa/router": "^14.0.0",
+    "@prisma/client": "^6.15.0",
+    "koa": "^3.0.1"
+  },
+  "devDependencies": {
+    "@tsconfig/node-ts": "^23.6.1",
+    "@tsconfig/node22": "^22.0.2",
+    "@types/koa": "^3.0.0",
+    "@types/koa__router": "^12.0.4",
+    "@types/node": "^24.3.0",
+    "prisma": "^6.15.0",
+    "tsx": "^4.20.5",
+    "typescript": "^5.9.2"
+  }
+}

apps/server/prisma/schema.prisma

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+// This is your Prisma schema file,
+// learn more about it in the docs: https://pris.ly/d/prisma-schema
+
+generator client {
+  provider = "prisma-client-js"
+  output   = "../generated/prisma"
+}
+
+datasource db {
+  provider = "sqlite"
+  url      = env("DATABASE_URL")
+}
+
+model Application {
+  id          Int      @id @default(autoincrement())
+  name        String
+  description String?
+  repository  String
+  valid       Int      @default(1)
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+  createdBy   String
+  updatedBy   String
+}
+
+model Environment {
+  id          Int      @id @default(autoincrement())
+  name        String
+  description String?
+  valid       Int      @default(1)
+  createdAt   DateTime @default(now())
+  updatedAt   DateTime @updatedAt
+  createdBy   String
+  updatedBy   String
+}

apps/server/tsconfig.json

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+{
+  "extends": [
+    "@tsconfig/node22/tsconfig.json",
+    "@tsconfig/node-ts/tsconfig.json"
+  ]
+}