Description

With Linux, if DOCKSAL_DNS_DISABLED=1 (This automatically sets DOCKSAL_DNS_DOMAIN=docksal.site and DOCKSAL_NO_DNS_RESOLVER=1.) fin function check_docksal_environment() will append nameserver ${DOCKSAL_IP} into /etc/resolv.conf.

Steps to reproduce the issue:

1. Set DOCKSAL_DNS_DISABLED=1 into docksal.env
2. Reset docksal: fin system reset
3. check that the dns container is no longer running: docker ps | grep docksal-dns
4. Restart a projet (to trigger check_docksal_environment): fin p restart

Describe the results you received:

nameserver ${DOCKSAL_IP} has been append to the first line of /etc/resolv.conf.

Describe the results you expected:
No /etc/resolv.conf modification

Proposed solution:
I propose to add a condition into fin check_docksal_environment ():

        local mode="${1:-on}"
        [[ "$DOCKSAL_NO_DNS_RESOLVER" != "0" ]] && mode='off'
        if is_linux && ! is_gitpod; then
			configure_resolver_alpine $mode