feat: establish backend foundation

src/main.spec.ts

@@ -0,0 +1,7 @@
+import { shouldExposeSwagger } from './config/swagger.config';
+
+describe('shouldExposeSwagger', () => {
+  it('does not expose Swagger outside development', () => {
+    expect(shouldExposeSwagger('test')).toBe(false);
+  });
+});