Chat Page Header

User story

As a user, I want the main chat page to have an improved header that displays the chat application's logo and the number of online users. The online user count should be retrieved from the connected user's array on the Node.js server.

Acceptance criteria

• The main chat page includes a header section.
• The header section displays the logo.
• The header section also shows the number of online users, retrieved from the connected user's array on the Node.js server.