fix: RedisConfig 운영 환경에 맞게 수정

Author: kimeunkyoungg

backend/src/main/java/com/back/global/config/RedisConfig.java

@@ -4,6 +4,8 @@
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.data.redis.connection.RedisConnectionFactory;
+import org.springframework.data.redis.connection.RedisPassword;
+import org.springframework.data.redis.connection.RedisStandaloneConfiguration;
 import org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory;
 import org.springframework.data.redis.core.RedisTemplate;
 import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer;
@@ -18,9 +20,19 @@ public class RedisConfig {
 	@Value("${spring.data.redis.port}")
 	private int port;
 
+	@Value("${spring.data.redis.password:}")
+	private String password;
+
 	@Bean
 	public RedisConnectionFactory redisConnectionFactory() {
-		return new LettuceConnectionFactory(host, port);
+		RedisStandaloneConfiguration config =
+			new RedisStandaloneConfiguration(host, port);
+
+		if (password != null && !password.isBlank()) {
+			config.setPassword(RedisPassword.of(password));
+		}
+
+		return new LettuceConnectionFactory(config);
 	}
 
 	@Bean

backend/src/main/resources/application.yml

@@ -24,7 +24,7 @@ spring:
     redis:
       host: localhost
       port: 6379
-      password: ${REDIS_PASSWORD}
+      password: ${REDIS_PASSWORD:}
 
 logging:
   level: