Remove default host from server.listen to allow by default to listen on ipv6 and ipv4

[fstaniulamartus]

Description

From node documentation:

If host is omitted, the server will accept connections on the unspecified IPv6 address (::) when IPv6 is available, or the unspecified IPv4 address (0.0.0.0) otherwise.

In most operating systems, listening to the unspecified IPv6 address (::) may cause the net.Server to also listen on the unspecified IPv4 address (0.0.0.0).

We were setting localhost by default in the configuration, which on some systems where ipv6 was available, it would listen only on ipv6 interface. Omitting the default host, would in turn allow to listen by default on both interfaces if not specified in the configuration by user.

Screenshots / Videos

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Checklist

• [x] My code follows the UI Code Style.
• [x] I followed the UI Testing Guidelines and verified that all tests/checks have passed.
• [x] I verified if that change requires any update in the documentation.
• [x] I added proper labels to this PR.

Tests

N/A

Documentation

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