diff --git a/README.md b/README.md
new file mode 100644
index 0000000..82b05f1
--- /dev/null
+++ b/README.md
@@ -0,0 +1,40 @@
+# 🛠️ Spring Boot Blog API Server
+
+## 🚀 Project Overview
+기존 **Jekyll(GitHub Pages)** 로 운영하던 정적 블로그의 한계를 극복하고, 확장 가능한 블로그 시스템을 구축하기 위해 개발한 **Spring Boot 기반의 REST API 서버**입니다.
+
+정적 사이트에서는 구현하기 어려웠던 **동적 포스팅 관리, 관리자 대시보드(Admin), 댓글 시스템** 등의 기능을 직접 구현하여 블로그 운영의 효율성을 높였습니다. **RESTful 원칙**에 입각한 API 설계와 **Spring Security**를 활용한 보안/인증 로직을 적용하여 백엔드 아키텍처 역량을 강화하는 데 중점을 두었습니다.
+
+### 🎯 Key Objectives
+* **Migration**: 정적 파일(Jekyll) 의존성을 제거하고 DB 기반의 동적 시스템으로 전환
+* **Feature Expansion**: 웹 에디터, 게시글 관리, 방문자 통계 등 관리자(Admin) 기능 추가
+* **Architecture**: 프론트엔드와 백엔드를 분리한 REST API 서버 구축
+
+### 🛠️ Tech Stack
+* **Java 21, Spring Boot 3.5.9**
+* **Spring Security, JWT** (Auth)
+* **JPA (Hibernate), QueryDSL** (ORM)
+* **PostgreSQL, Redis** (Cache/Session)
+* **Markdown Parser** (Content)
+
+---
+
+## 🔌 API Reference
+
+**Base URL**: `http://localhost:8080`  
+**Auth**: `Authorization: Bearer {Access_Token}`
+
+### 1. 공통 응답 규격 (Common Response)
+모든 API 응답은 아래 표준 포맷을 따릅니다.
+
+```json
+{
+  "code": "SUCCESS",       // 결과 코드 (SUCCESS 또는 ERROR_CODE)
+  "message": "요청 성공",   // 응답 메시지
+  "data": { ... }          // 실제 데이터 (없을 경우 null)
+}
+```
+
+## 관련 문서
+- [**ENDPOINT**](https://affine.wypark.me/workspace/f85df0c4-a315-4166-94a8-6558cdafff1d/p13joh_beKNJ6R-I9KrFW)  
+- [**API 명세서**](https://affine.wypark.me/workspace/f85df0c4-a315-4166-94a8-6558cdafff1d/7fRNXK9utxG4mcekWivGK)
\ No newline at end of file
diff --git a/build.gradle.kts b/build.gradle.kts
index b975943..e0b3b82 100644
--- a/build.gradle.kts
+++ b/build.gradle.kts
@@ -1,9 +1,10 @@
 plugins {
     kotlin("jvm") version "1.9.25"
     kotlin("plugin.spring") version "1.9.25"
+    kotlin("plugin.jpa") version "1.9.25"
+    kotlin("kapt") version "1.9.25"
     id("org.springframework.boot") version "3.5.9"
     id("io.spring.dependency-management") version "1.1.7"
-    kotlin("plugin.jpa") version "1.9.25"
 }
 
 group = "me.wypark"
@@ -12,7 +13,7 @@ description = "blog-backend"
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(21)
+        languageVersion = JavaLanguageVersion.of(21) // Java 21 굿!
     }
 }
 
@@ -20,22 +21,43 @@ repositories {
     mavenCentral()
 }
 
+val springCloudAwsVersion = "3.2.1"
+
 dependencies {
+    // 1. Standard Spring Boot Starters
     implementation("org.springframework.boot:spring-boot-starter-data-jpa")
     implementation("org.springframework.boot:spring-boot-starter-security")
     implementation("org.springframework.boot:spring-boot-starter-web")
     implementation("org.springframework.boot:spring-boot-starter-data-redis")
+    implementation("org.springframework.boot:spring-boot-starter-validation")
+
+    // 2. Kotlin Modules
     implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
     implementation("org.jetbrains.kotlin:kotlin-reflect")
-    developmentOnly("org.springframework.boot:spring-boot-devtools")
+
+    // 3. Database Drivers
     runtimeOnly("org.postgresql:postgresql")
+
+    // 4. AWS S3 / MinIO
+    implementation("io.awspring.cloud:spring-cloud-aws-starter-s3:$springCloudAwsVersion")
+
+    // 5. QueryDSL
+    implementation("com.querydsl:querydsl-jpa:5.1.0:jakarta")
+    kapt("com.querydsl:querydsl-apt:5.1.0:jakarta")
+    kapt("jakarta.persistence:jakarta.persistence-api")
+    kapt("jakarta.annotation:jakarta.annotation-api")
+
+    // 6. JWT (0.12.x)
+    implementation("io.jsonwebtoken:jjwt-api:0.12.3")
+    runtimeOnly("io.jsonwebtoken:jjwt-impl:0.12.3")
+    runtimeOnly("io.jsonwebtoken:jjwt-jackson:0.12.3")
+
+    // 7. Test & Dev
+    developmentOnly("org.springframework.boot:spring-boot-devtools")
     testImplementation("org.springframework.boot:spring-boot-starter-test")
     testImplementation("org.jetbrains.kotlin:kotlin-test-junit5")
     testImplementation("org.springframework.security:spring-security-test")
     testRuntimeOnly("org.junit.platform:junit-platform-launcher")
-    implementation("io.jsonwebtoken:jjwt-api:0.12.3")
-    runtimeOnly("io.jsonwebtoken:jjwt-impl:0.12.3")
-    runtimeOnly("io.jsonwebtoken:jjwt-jackson:0.12.3")
 }
 
 kotlin {
@@ -52,4 +74,4 @@ allOpen {
 
 tasks.withType<Test> {
     useJUnitPlatform()
-}
+}
\ No newline at end of file
diff --git a/docker-compose.yml b/docker-compose.yml
index 852b47c..a9d0b66 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,15 +1,24 @@
 services:
-  # 백엔드 애플리케이션
+  # 1. 백엔드 애플리케이션
   blog-api:
     build: .
     container_name: blog-api
     restart: always
+    ports:
+      - "8080:8080"
     environment:
+      # Database
       - SPRING_DATASOURCE_URL=jdbc:postgresql://db:5432/blog_db
       - SPRING_DATASOURCE_USERNAME=wypark
       - SPRING_DATASOURCE_PASSWORD=your_password
+      # Redis
       - SPRING_DATA_REDIS_HOST=redis
       - SPRING_DATA_REDIS_PORT=6379
+      # AWS S3 / MinIO (Docker 내부 통신용)
+      - CLOUD_AWS_CREDENTIALS_ACCESS_KEY=admin
+      - CLOUD_AWS_CREDENTIALS_SECRET_KEY=password
+      - CLOUD_AWS_REGION_STATIC=ap-northeast-2
+      - CLOUD_AWS_S3_ENDPOINT=http://minio:9000
     depends_on:
       db:
         condition: service_healthy
@@ -18,11 +27,13 @@ services:
     networks:
       - blog-net
 
-  # 데이터베이스 (PostgreSQL 17 추천)
+  # 2. 데이터베이스 (PostgreSQL)
   db:
     image: postgres:17-alpine
     container_name: blog-db
     restart: always
+    ports:
+      - "5432:5432"
     environment:
       POSTGRES_USER: wypark
       POSTGRES_PASSWORD: your_password
@@ -36,7 +47,7 @@ services:
     networks:
       - blog-net
 
-  # 캐시 서버 (Redis 7)
+  # 3. 캐시 서버 (Redis)
   redis:
     image: redis:7-alpine
     container_name: blog-redis
@@ -48,6 +59,22 @@ services:
     networks:
       - blog-net
 
+  # 4. 오브젝트 스토리지 (MinIO)
+  minio:
+    image: minio/minio
+    container_name: minio
+    ports:
+      - "9000:9000" # API 통신
+      - "9001:9001" # 웹 콘솔
+    environment:
+      MINIO_ROOT_USER: "admin"
+      MINIO_ROOT_PASSWORD: "password"
+    command: server /data --console-address ":9001"
+    volumes:
+      - ./minio_data:/data
+    networks:
+      - blog-net
+
 networks:
   blog-net:
     driver: bridge
\ No newline at end of file
diff --git a/src/main/kotlin/me/wypark/blogbackend/domain/auth/RefreshTokenRepository.kt b/src/main/kotlin/me/wypark/blogbackend/domain/auth/RefreshTokenRepository.kt
index 6820f27..39b6b02 100644
--- a/src/main/kotlin/me/wypark/blogbackend/domain/auth/RefreshTokenRepository.kt
+++ b/src/main/kotlin/me/wypark/blogbackend/domain/auth/RefreshTokenRepository.kt
@@ -11,7 +11,6 @@ class RefreshTokenRepository(
     @Value("\${jwt.refresh-token-validity}") private val refreshTokenValidity: Long
 ) {
     // 저장 (Key: Email, Value: RefreshToken)
-    // RTR 핵심: 사용자가 로그인을 새로 하거나 토큰을 재발급 받을 때마다 덮어씌움
     fun save(email: String, refreshToken: String) {
         redisTemplate.opsForValue().set(
             "RT:$email",
diff --git a/src/main/resources/application-prod.yml b/src/main/resources/application-prod.yml
index 4debd48..7e8f51e 100644
--- a/src/main/resources/application-prod.yml
+++ b/src/main/resources/application-prod.yml
@@ -1,19 +1,49 @@
 spring:
+  application:
+    name: blog-api
+
+  # 1. 데이터베이스 설정
   datasource:
+    # Docker 내부 통신용
     url: jdbc:postgresql://db:5432/blog_db
-    username: wypark
-    password: your_password
+    username: ${SPRING_DATASOURCE_USERNAME:wypark}
+    password: ${SPRING_DATASOURCE_PASSWORD:your_password}
+    driver-class-name: org.postgresql.Driver
+
+  # 2. JPA 설정
   jpa:
     hibernate:
       ddl-auto: update
     properties:
       hibernate:
-        format_sql: true
+        format_sql: true       # 쿼리 줄바꿈
+        show_sql: true         # 쿼리 출력
+        highlight_sql: true    # 쿼리 색상 강조 (가독성 UP)
+    open-in-view: false        # OSIV 종료 (DB 커넥션 최적화)
+
+  # 3. Redis 설정
   data:
     redis:
-      host: redis
+      host: redis # Docker 서비스명
       port: 6379
+
+# 4. AWS S3 / MinIO 설정 (아까 이야기한 부분)
+cloud:
+  aws:
+    s3:
+      bucket: my-blog-bucket # MinIO 콘솔에서 미리 생성해야 함
+      endpoint: http://minio:9000 # Docker 내부 통신용
+    credentials:
+      access-key: admin
+      secret-key: password
+    region:
+      static: ap-northeast-2
+    stack:
+      auto: false
+
+# 5. JWT 설정
 jwt:
-  secret: "v3ryS3cr3tK3yF0rMyB10gPr0j3ctM4k3ItL0ng3rTh4n32Byt3s!!" # 32바이트 이상 필수
-  access-token-validity: 1800000  # 30분 (ms)
-  refresh-token-validity: 604800000 # 7일 (ms)
\ No newline at end of file
+  # 보안 경고: 실제 배포 시에는 절대 코드에 비밀키를 남기지 마세요. 환경변수로 주입받으세요.
+  secret: ${JWT_SECRET:v3ryS3cr3tK3yF0rMyB10gPr0j3ctM4k3ItL0ng3rTh4n32Byt3s!!}
+  access-token-validity: 1800000  # 30분
+  refresh-token-validity: 604800000 # 7일
\ No newline at end of file