Update README.md

[adrianvu]

Previously had an error connection refused. Fix "-p 8080:80" to "-p 80:80". Port 80 instead of 8080 was exposed in Dockerfile. Now it should work when trying to access from outside the container.

[bylexus]

I do not agree: The documentation is meant to show how to map another Host's port to the internal port 80. This is common practice if you have multiple containers running on the same host.
Of course you CAN map it to the host's standard port 80, but you don't have to.

[bylexus]

• I do not agree to the README.md file change: It is intentional that this is documented as Port 8080:80, as this is the common use case for docker containers. Please remove this change.

• Agree to the Dockerfile change, I will accept this change, but please create a new pull request: You're mixing 2 changes under the same title here.

--> Please change this request as suggested:

1. Remove the README.md change
2. Rename the change request, as the title now says "Updated README.md"

Thanks