diff --git a/.github/workflows/gradle.yml b/.github/workflows/gradle.yml
index 48dc409..ce890c6 100644
--- a/.github/workflows/gradle.yml
+++ b/.github/workflows/gradle.yml
@@ -1,4 +1,4 @@
-name: meetup Server CI/CD with Docker
+name: meetup Server CI/CD with Docker.
 
 on:
   push:
@@ -16,10 +16,10 @@ jobs:
 
     steps:
     - uses: actions/checkout@v3
-    - name: 🍃 JDK 17로 설정합니다.
+    - name: 🍃 JDK 11로 설정합니다.
       uses: actions/setup-java@v3
       with:
-        java-version: '17'
+        java-version: '11'
         distribution: 'temurin'
 
 
diff --git a/Dockerfile b/Dockerfile
index 3ef1a25..30fba83 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,3 +1,4 @@
-FROM openjdk:17-alpine
+#ci/cd
+FROM openjdk:11-jdk
 COPY ./build/libs/server-0.0.1-SNAPSHOT.jar app.jar
 ENTRYPOINT ["java", "-jar", "app.jar"]
\ No newline at end of file
diff --git a/build.gradle b/build.gradle
index 7d2ebcd..af53e2b 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,20 +1,14 @@
 plugins {
 	id 'java'
-	id 'org.springframework.boot' version '3.1.4'
-	id 'io.spring.dependency-management' version '1.1.3'
+	id 'org.springframework.boot' version '2.7.16'
+	id 'io.spring.dependency-management' version '1.0.15.RELEASE'
 }
 
-group = 'meetup'
+group = 'com.groupD'
 version = '0.0.1-SNAPSHOT'
 
 java {
-	sourceCompatibility = '17'
-}
-
-configurations {
-	compileOnly {
-		extendsFrom annotationProcessor
-	}
+	sourceCompatibility = '11'
 }
 
 repositories {
@@ -22,12 +16,18 @@ repositories {
 }
 
 dependencies {
-	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
-	implementation 'org.springframework.boot:spring-boot-starter-web'
+	implementation 'org.springframework.boot:spring-boot-starter'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+
+	// lombok
 	compileOnly 'org.projectlombok:lombok'
-	runtimeOnly 'com.mysql:mysql-connector-j'
 	annotationProcessor 'org.projectlombok:lombok'
-	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+
+	// jpa
+	implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+
+	//db
+	runtimeOnly 'com.mysql:mysql-connector-j'
 	implementation 'mysql:mysql-connector-java:8.0.33'
 }
 
diff --git a/docker-compose.yml b/docker-compose.yml
index cfbef9a..3d3820f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,3 +1,4 @@
+#ci/cd
 version: '3'
 services:
   blue:
diff --git a/scripts/deploy.sh b/scripts/deploy.sh
index 1c64d6e..c52d748 100644
--- a/scripts/deploy.sh
+++ b/scripts/deploy.sh
@@ -1,47 +1,59 @@
 #!/bin/bash
-IS_GREEN_EXIST=$(docker ps | grep green)
+
+IS_GREEN=$(docker ps | grep green) # 현재 실행중인 App이 blue인지 확인합니다.
 DEFAULT_CONF=" /etc/nginx/nginx.conf"
-if [ -z $IS_GREEN_EXIST ];then
+
+if [ -z $IS_GREEN  ];then # blue라면
+
   echo "### BLUE => GREEN ####"
-  echo ">>> green image를 pull합니다."
-  docker-compose pull green
-  echo ">>> green container를 up합니다."
-  docker-compose up -d green
+
+  echo "1. get green image"
+  docker-compose pull green # green으로 이미지를 내려받습니다.
+
+  echo "2. green container up"
+  docker-compose up -d green # green 컨테이너 실행
+
   while [ 1 = 1 ]; do
-  echo ">>> green health check 중..."
+  echo "3. green health check..."
   sleep 3
-  REQUEST=$(curl http://127.0.0.1:8082)
-    if [ -n "$REQUEST" ]; then
-      echo ">>> 🍃 health check success !"
-      break;
-    fi
+
+  REQUEST=$(curl http://127.0.0.1:8082) # green으로 request
+    if [ -n "$REQUEST" ]; then # 서비스 가능하면 health check 중지
+            echo "health check success"
+            break ;
+            fi
   done;
-  sleep 3
-  echo ">>> nginx를 다시 실행 합니다."
+
+  echo "4. reload nginx"
   sudo cp /etc/nginx/nginx.green.conf /etc/nginx/nginx.conf
   sudo nginx -s reload
-  echo ">>> blue container를 down합니다."
+
+  echo "5. blue container down"
   docker-compose stop blue
-# green이 실행 중이면 blue를 up합니다.
 else
   echo "### GREEN => BLUE ###"
-  echo ">>> blue image를 pull합니다."
+
+  echo "1. get blue image"
   docker-compose pull blue
-  echo ">>> blue container up합니다."
+
+  echo "2. blue container up"
   docker-compose up -d blue
+
   while [ 1 = 1 ]; do
-    echo ">>> blue health check 중..."
+    echo "3. blue health check..."
     sleep 3
-    REQUEST=$(curl http://127.0.0.1:8081)
-    if [ -n "$REQUEST" ]; then
-      echo ">>> 🍃 health check success !"
-      break;
+    REQUEST=$(curl http://127.0.0.1:8081) # blue로 request
+
+    if [ -n "$REQUEST" ]; then # 서비스 가능하면 health check 중지
+      echo "health check success"
+      break ;
     fi
   done;
-  sleep 3
-  echo ">>> nginx를 다시 실행 합니다."
+
+  echo "4. reload nginx"
   sudo cp /etc/nginx/nginx.blue.conf /etc/nginx/nginx.conf
   sudo nginx -s reload
-  echo ">>> green container를 down합니다."
+
+  echo "5. green container down"
   docker-compose stop green
 fi
\ No newline at end of file
diff --git a/src/main/java/meetup/server/ServerApplication.java b/src/main/java/meetup/server/ServerApplication.java
index 8eecc69..53a02a3 100644
--- a/src/main/java/meetup/server/ServerApplication.java
+++ b/src/main/java/meetup/server/ServerApplication.java
@@ -5,7 +5,7 @@
 
 @SpringBootApplication
 public class ServerApplication {
-//q
+//qq
 	public static void main(String[] args) {
 		SpringApplication.run(ServerApplication.class, args);
 	}
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 1b238de..70b2516 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -1,4 +1,5 @@
 server:
+
   port: 8080
 
 spring: