docs: update socila media project

Signed-off-by: Otavio Santana <otaviopolianasantana@gmail.com>

Author: otaviojava

01-system-design/06-scenario/03-social-media.adoc

@@ -38,6 +38,45 @@ Enterprise_Boundary(b0, "X Platform") {
 
 [source, mermaid]
 ----
+C4Container
+title Container Diagram - Social Media Feed (X)
+
+System_Ext(notification_system, "🔔 Notification System", "External push/email infrastructure", $tags="v1.0")
+System_Ext(media_service, "🖼️ Media Service", "Stores and serves images/videos", $tags="v1.0")
+System_Ext(auth_service, "🔐 Auth Service", "Authentication and token validation", $tags="v1.0")
+System_Ext(analytics_system, "📊 Analytics Service", "Collects engagement metrics", $tags="v1.0")
+Person(user, "🧑 User", "Person who interacts with the platform via web or mobile", $tags="v1.0")
+
+Container_Boundary(c1, "📣 Feed System") {
+  Container(web_app, "🌐 Web App", "React", "Web interface to browse, post, and interact with tweets")
+  Container(mobile_app, "📱 Mobile App", "Flutter", "Mobile access to feed and user actions")
+  Container(api_gateway, "🛡 API Gateway", "Spring Cloud Gateway", "Entry point for clients and routing")
+  Container(user_service, "🧑‍🤝‍🧑 User Service", "Java, Spring Boot", "Handles profiles, followers, and authentication integration")
+  Container(tweet_service, "🐦 Tweet Service", "Java, Spring Boot", "Manages posting, deleting, and retrieving tweets")
+  Container(feed_service, "📥 Feed Service", "Java, Spring Boot", "Assembles personalized timelines")
+  Container(interaction_service, "❤️ Interaction Service", "Java, Spring Boot", "Handles likes, retweets, and comments")
+  ContainerDb(database, "🗃️ Feed Database", "Cassandra", "Stores tweets, timelines, and interactions")
+  Container(cache, "⚡ Redis Cache", "Redis", "Caches hot feeds and trending posts")
+}
+
+Rel(user, web_app, "Uses", "HTTPS")
+Rel(user, mobile_app, "Uses", "HTTPS")
+Rel(web_app, api_gateway, "Calls", "HTTPS")
+Rel(mobile_app, api_gateway, "Calls", "HTTPS")
+
+Rel(api_gateway, user_service, "Routes auth/profile requests", "REST")
+Rel(api_gateway, tweet_service, "Routes tweet actions", "REST")
+Rel(api_gateway, feed_service, "Routes feed queries", "REST")
+Rel(api_gateway, interaction_service, "Routes likes/comments", "REST")
+
+Rel(tweet_service, database, "Stores tweets", "Async/Batch")
+Rel(feed_service, cache, "Reads hot timelines", "Redis")
+Rel(feed_service, database, "Reads personalized timeline", "Cassandra")
+Rel(interaction_service, database, "Updates likes/comments", "Async")
+Rel(tweet_service, media_service, "Uploads/loads media", "HTTPS")
+Rel(user_service, auth_service, "Validates token", "HTTPS")
+Rel(tweet_service, analytics_system, "Tracks tweet activity", "Async")
+Rel(interaction_service, notification_system, "Triggers notifications", "HTTPS")
 ----
 
 === System Integration Flow