Merge pull request #4 from f-lab-edu/feature/3

feat: 회원 가입 및 로그인 API 구현

Author: KOO612

backend/.env.example

@@ -1,3 +1,15 @@
 NODE_ENV=development
 HEALTH_CHECK_NAME=your-health-check-name
-HEALTH_CHECK_URL=http://localhost:3000/ping
+HEALTH_CHECK_URL=http://localhost:3000/ping
+
+
+#Database
+DB_HOST=localhost
+DB_PORT=5432
+DB_USERNAME=test
+DB_PASSWORD=test
+DB_DATABASE=test-database
+
+
+#JWT
+JWT_SECRET=secret-key