Network Configuration
The Network section on the container Docker Settings page sets the network protocol and port mappings for the load balancer that fronts your container. Edit the fields and use Save to stage the change, which is applied through the project deploy flow.
Network protocol
Network protocol is a dropdown that defaults to TCP. It sets the protocol the load balancer uses to reach the container.
Port mappings
Port mappings route external traffic to the port your container listens on. The list starts empty, with "No port mappings configured". Use Add port to add a mapping row, and repeat for each port your container exposes.
Only expose the ports that need external access. Check that your application actually listens on the port you map. If it does not, the load balancer has nothing to connect to.