Map `ports` to the exact ports by default for tasks (and fail if the port is taken)

Support the following scenarios:

1.
`ports: [8000]` - map to 8000 of fail if the port is taken

2.
`ports: ["8001:8000"]` - map to 8001 of fail if the port is taken

3.
`ports: ["*:8000"]` - map to 8000 of fail another if the port is taken