private server 세팅을 위한 docker-compsoe (#211)

* feat: github 환경 변수 설정을 위해 필요한 정보 .env.example로 설정

* feat: DB서버 세팅을 위한 docker-compose 및 .env 예제 파일

Author: fru1tworld

example/.env.example

@@ -0,0 +1,12 @@
+# Redis
+REDIS_PASSWORD=your_redis_password
+
+# MongoDB
+MONGO_USERNAME=your_mongo_username
+MONGO_PASSWORD=your_mongo_password
+
+# MySQL
+MYSQL_ROOT_PASSWORD=your_mysql_root_password
+MYSQL_DATABASE=your_database_name
+MYSQL_USER=your_mysql_username
+MYSQL_PASSWORD=your_mysql_password

example/docker-compose.db.yml

@@ -0,0 +1,55 @@
+version: '3.8'
+
+services:
+  redis:
+    image: redis:latest
+    container_name: redis
+    command: redis-server --requirepass ${REDIS_PASSWORD}
+    ports:
+      - "6379:6379"
+    volumes:
+      - redis_data:/data
+    networks:
+      - database_network
+    restart: unless-stopped
+    environment:
+      - REDIS_PASSWORD=${REDIS_PASSWORD}
+
+  mongodb:
+    image: mongo:latest
+    container_name: mongodb
+    ports:
+      - "27017:27017"
+    volumes:
+      - mongodb_data:/data/db
+    networks:
+      - database_network
+    restart: unless-stopped
+    environment:
+      - MONGO_INITDB_ROOT_USERNAME=${MONGO_USERNAME}
+      - MONGO_INITDB_ROOT_PASSWORD=${MONGO_PASSWORD}
+
+  mysql:
+    image: mysql:8
+    container_name: mysql
+    ports:
+      - "3306:3306"
+    volumes:
+      - mysql_data:/var/lib/mysql
+    networks:
+      - database_network
+    restart: unless-stopped
+    environment:
+      - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
+      - MYSQL_DATABASE=${MYSQL_DATABASE}
+      - MYSQL_USER=${MYSQL_USER}
+      - MYSQL_PASSWORD=${MYSQL_PASSWORD}
+
+networks:
+  database_network:
+    driver: bridge
+
+volumes:
+  redis_data:
+  mongodb_data:
+  mysql_data: