fixed yaml

Removed unnecessary build context and updated port syntax in README.

README.md

@@ -33,10 +33,9 @@ To deploy the calculator on a server, you only need Docker and Docker Compose in
     ```yaml
     services:
       web:
-        build: .
         image: ghcr.io/jones013/jack_calculator:latest
         ports:
-          - "8888:80"
+          - 8888:80
         restart: unless-stopped
     ```
 
@@ -53,7 +52,3 @@ The calculator will then be available at `http://<your-server-ip>:8888`.
 **Note on Firewalls**: Ensure that your server's firewall is configured to allow incoming traffic on port 8888.
 
 ---
-
-## Branches
-
-Use `**main`** or `**user**` for this layout. Maintainer tooling and full docs live on the `**developer**` branch.