BUG: Error during deploing if subdomain has '_' (underscore) in name

[zipofar]

Related issue https://github.com/UffizziCloud/uffizzi_platform/issues/17

[AnnaPochepina]

tested

[NealArw]

TESTED on prod - OK

# uffizzi preview create -o=json compose.yml
[✔] Creating containers...
[✔] Deploying preview...
  [✔] webhooks-test-app
{"id":"deployment-4","url":"https://deployment-4-test-2.app.qa-gke.uffizzi.com"}
# uffizzi project list
test_2