Add -p argument for docker run command example
Add -p argument for docker run command example

Signed-off-by: Jurrie Overgoor <e387cc97f3047765ba5583d517f62b184fbc1de5@users.noreply.github.com>
matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse,matrix-org/synapse