feat: establish backend foundation

test/runtime-check.cjs

@@ -0,0 +1,8 @@
+const assert = require('node:assert/strict');
+const { existsSync, readFileSync } = require('node:fs');
+
+const packageJson = JSON.parse(readFileSync('package.json', 'utf8'));
+
+assert.equal(packageJson.scripts['start:prod'], 'node dist/src/main.js');
+assert.ok(existsSync('dist/src/main.js'));
+assert.doesNotThrow(() => require('../dist/generated/prisma/client.js'));