Building a chat server

Before writing any code, we should state our goals for creating this chat system.

The chat server is designed to listen on a UNIX socket at /tmp/chat.sock. The code should handle creating and managing this socket, ensuring any existing socket file is removed before starting, thereby avoiding conflicts.

Upon launching, the server should maintain a continuous loop, perpetually waiting for new client connections. Each successful connection is handled in a separate goroutine, allowing the server to manage multiple clients concurrently.

One of the key features of this server is its ability to manage multiple client connections simultaneously. To achieve this, combining slices to store client connections and a mutex for concurrent access control seems like a good idea, ensuring thread-safe operations on shared data.

Whenever a new client connects, the server should send them the entire history of messages, providing a context-rich experience. This historical...