replace port 5000 with port 8080

[dcmcand]

Fixes #618 .

Description

Replaces port 5000 with port 8080 as the default port to run on. Port 8080 is not a privileged port, but is an alternate port for HTTP. Port 5000 is in use on some Mac computers which causes conflicts.

This pull request:

• Replaces port 5000 with port 8080 as default port.

Pull request checklist

• Did you test this change locally?
• Did you update the documentation (if required)?
• Did you add/update relevant tests for this change (if required)?

Additional information

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[costrouc]

This is LONG overdue 😄. The 5000 port is used for airpods and I remember first encountering this with @pierrotsmnrd 's laptop.

[costrouc]

This may cause a breaking change in the client's etc. assuming port 5000 by default but I'm unsure. Most clients use 80/443 with a proper installation. But I know a lot of the development assumptions in clients use 5000.

[kcpevey]

This may cause a breaking change in the client's etc. assuming port 5000 by default but I'm unsure.

We'll need to make a note in the release notes.

[nkaretnikov]

Have you tested this with conda-store-ui? For me, this breaks the login process (when you click on the Login button) when using conda-store-ui. Because the UI assumes port 5000 for conda-store. I'll open an issue on the UI side.

Also, port 8080 is what conda-store-ui has been using.