allow to customize nameserver deployment #24

Job	Run time
android	54s
cross (linux, arm64)	1m 24s
cross (linux, 386)	1m 28s
cross (linux, loong64)	1m 26s
cross (linux, arm, 5)	1m 26s
cross (linux, arm, 7)	2m 31s
crossmin (plan9, amd64)	22s
cross (darwin, amd64)	1m 29s
crossmin (aix, ppc64)	25s
cross (darwin, arm64)	1m 29s
depaware	31s
cross (windows, amd64)	1m 13s
fuzz	7m 0s
cross (windows, arm64)	1m 12s
cross (freebsd, amd64)	1m 21s
go_generate	1m 3s
cross (openbsd, amd64)	1m 19s
go_mod_tidy	25s
ios	46s
licenses	6s
privileged	51s
race-build	4m 26s
race-root-integration (1/4)	1m 18s
staticcheck (linux, amd64)	3m 35s
race-root-integration (2/4)	1m 22s
tailscale_go	31s
test (amd64, -coverprofile=/tmp/coverage.out)	3m 31s
staticcheck (windows, amd64)	3m 31s
race-root-integration (3/4)	1m 18s
test (amd64, -race, 1/3)	3m 11s
staticcheck (darwin, amd64)	3m 33s
race-root-integration (4/4)	1m 17s
vm	0s
test (amd64, -race, 2/3)	3m 19s
staticcheck (windows, 386)	3m 19s
test (amd64, -race, 3/3)	3m 46s
wasm	6m 42s
windows	4m 40s
test (386)	2m 45s
check_mergeability	3s
notify_slack	2s
	1h 20m 50s

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