feat: docker 이용한 서버 실행 및 사용 설명 추가, 환경변수 이용한 주소

처리 추가

compose.yml

@@ -1,12 +1,34 @@
+name: sword_game
+
 services:
   db:
     image: mysql:8.0
-    container_name: socket_server_db
+    container_name: game_server_db
     restart: always
     environment:
       MYSQL_ROOT_PASSWORD: root_password
       MYSQL_DATABASE: socket_server
-    ports:
-      - "33306:3306"
     volumes:
       - ./schema.sql:/docker-entrypoint-initdb.d/schema.sql
+
+  server:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    container_name: game_server
+    restart: always
+    depends_on:
+      - db
+    environment:
+      - DB_HOST=db
+      - DB_PORT=3306
+      - DB_USER=root
+      - DB_PASSWORD=root_password
+      - DB_NAME=socket_server
+    ports:
+      - "30000:30000"
+
+networks:
+  default:
+    driver: bridge
+    name: sword_game_network