The docker run command is used to create and start a new container from an image. The -p option maps a port on the host to a port in the container.
* Port Mapping: The syntax -p [host_ip:host_port:container_port/protocol] is used to map ports.
* Exposing Port 8443: The correct mapping to expose the API on port 8443 and allow external connections is 0.0.0.0:443:8443/tcp, which maps port 443 on the host to port 8443 in the container.
Option B correctly maps the ports and allows external connections.
Reference:
Docker Documentation: Docker Run Reference