Updating tail lines text, and required flags

[msaxon]

Changes

• Updating the tail lines command description to include the allowed range of values
• Updated process ID to be required

Logs

~/repos/hathora/ci git:[tail-line-update]
go run ./cmd/run.go log -a app-<redacted> --follow --tail-lines 100 | grep LogNats
WARN    You are using a development version of the hathora cli.
WARN    Version 0.0.9 is available for download.
[ERROR] Required flag "process-id" is not set
exit status 1