feat: add .env.example templates for development setup

- Create .env.example with database and API key placeholders
- Add backend/.env.example for backend development
- Add frontend/.env.example for Vite frontend config
- Add tests/env-example.spec.ts with 13 validation tests
- Verify .gitignore correctly ignores .env files

tests/env-example.spec.ts

@@ -0,0 +1,89 @@
+import { describe, it, expect } from 'vitest';
+import { readFileSync, existsSync } from 'fs';
+import { resolve } from 'path';
+
+describe('Environment Example Files', () => {
+  describe('Root .env.example', () => {
+    const rootEnvPath = resolve(__dirname, '..', '.env.example');
+
+    it('should exist and contain DATABASE_URL', () => {
+      expect(existsSync(rootEnvPath)).toBe(true);
+      const content = readFileSync(rootEnvPath, 'utf-8');
+      expect(content).toContain('DATABASE_URL');
+    });
+
+    it('should contain IGDB_CLIENT_ID and IGDB_CLIENT_SECRET', () => {
+      const content = readFileSync(rootEnvPath, 'utf-8');
+      expect(content).toContain('IGDB_CLIENT_ID');
+      expect(content).toContain('IGDB_CLIENT_SECRET');
+    });
+
+    it('should contain RAWG_API_KEY', () => {
+      const content = readFileSync(rootEnvPath, 'utf-8');
+      expect(content).toContain('RAWG_API_KEY');
+    });
+
+    it('should contain THEGAMESDB_API_KEY', () => {
+      const content = readFileSync(rootEnvPath, 'utf-8');
+      expect(content).toContain('THEGAMESDB_API_KEY');
+    });
+
+    it('should contain NODE_ENV', () => {
+      const content = readFileSync(rootEnvPath, 'utf-8');
+      expect(content).toContain('NODE_ENV');
+    });
+
+    it('should contain PORT and LOG_LEVEL', () => {
+      const content = readFileSync(rootEnvPath, 'utf-8');
+      expect(content).toContain('PORT');
+      expect(content).toContain('LOG_LEVEL');
+    });
+  });
+
+  describe('Backend .env.example', () => {
+    const backendEnvPath = resolve(__dirname, '..', 'backend', '.env.example');
+
+    it('should exist', () => {
+      expect(existsSync(backendEnvPath)).toBe(true);
+    });
+
+    it('should contain DATABASE_URL', () => {
+      const content = readFileSync(backendEnvPath, 'utf-8');
+      expect(content).toContain('DATABASE_URL');
+    });
+
+    it('should contain all API keys', () => {
+      const content = readFileSync(backendEnvPath, 'utf-8');
+      expect(content).toContain('IGDB_CLIENT_ID');
+      expect(content).toContain('IGDB_CLIENT_SECRET');
+      expect(content).toContain('RAWG_API_KEY');
+      expect(content).toContain('THEGAMESDB_API_KEY');
+    });
+  });
+
+  describe('Frontend .env.example', () => {
+    const frontendEnvPath = resolve(__dirname, '..', 'frontend', '.env.example');
+
+    it('should exist', () => {
+      expect(existsSync(frontendEnvPath)).toBe(true);
+    });
+
+    it('should contain VITE_API_URL', () => {
+      const content = readFileSync(frontendEnvPath, 'utf-8');
+      expect(content).toContain('VITE_API_URL');
+    });
+
+    it('should contain VITE_APP_NAME', () => {
+      const content = readFileSync(frontendEnvPath, 'utf-8');
+      expect(content).toContain('VITE_APP_NAME');
+    });
+  });
+
+  describe('Git Ignore Configuration', () => {
+    it('should ignore .env files', () => {
+      const gitignorePath = resolve(__dirname, '..', '.gitignore');
+      const content = readFileSync(gitignorePath, 'utf-8');
+      expect(content).toContain('.env');
+    });
+  });
+});