Update Dockerfile

Dockerfile

@@ -1,11 +1,11 @@
 # Use the official Ubuntu 18.04 image as a base
 FROM ubuntu:18.04
 
-# Update the system and install Redis
-RUN apt-get update && apt-get install -y redis-server
-
 # Expose the default Redis port
 EXPOSE 6379
 
+# Update the system and install Redis
+RUN apt-get update && apt-get install -y redis-server
+
 # Run the Redis server as the main process
 CMD ["redis-server"]