fix: replace all localhost instances with 127.0.0.1

[kamilogorek]

Essentially s/localhost/127.0.0.1/g. Using localhost can be flaky due to cli running in various environments and this will potentially fix some random network issues that has been reported.

We don't want to perform a lookup on localhost as it will go to IPv6 first, where we always want to use IPv4 instead.

[coveralls]

Pull Request Test Coverage Report for Build 6592371308

• 28 of 34 (82.35%) changed or added relevant lines in 11 files are covered.
• 5 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-0.03%) to 57.035%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
internal/db/diff/diff.go	0	1	0.0%
internal/db/start/start.go	2	3	66.67%
internal/utils/flags/db_url.go	0	1	0.0%
internal/start/start.go	11	14	78.57%

Files with Coverage Reduction	New Missed Lines	%
internal/gen/keys/keys.go	5	12.31%

Totals
Change from base Build 6557313119:	-0.03%
Covered Lines:	5197
Relevant Lines:	9112

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💛 - Coveralls

[sweatybridge]

Thanks! This could potentially resolve #1574

I've renamed the PR title to trigger a patch release.