how to start a docker container along-with its parameters changed?
<p>I downloaded the official docker httpd container, but by default it maps my port 32770 to its port 80. i want that whenever i start the container, it listens on my port 80 -> 80. </p>

<p>is there any command line argument at docker startup to give or i can hard-coded this mapping in docker? </p>

<p>I tried to run it with "docker run " command , but every time it starts a new instance of it, and i lose my changes that i made to the docker container i want to use. how can i retain the port mapping changes?</p>