Fixed:
- "ineffective break statement. Did you mean to break out of the outer loop?" (SA4011)
- "channels used with os/signal.Notify should be buffered" (SA1017)
- "os.Kill cannot be trapped (did you mean syscall.SIGTERM?)" (SA1016)
- "func envOrDefaultBool is unused" (U1000)
- "should use time.Since instead of time.Now().Sub" (S1012)