Support start_interval in healthcheck block

Signed-off-by: Robin Syl <robin@robinsyl.dev>

podman_compose.py

@@ -1041,13 +1041,15 @@ async def container_to_args(compose, cnt, detached=True):
  else:
  raise ValueError("'healthcheck.test' either a string or a list")
 
- # interval, timeout and start_period are specified as durations.
+ # interval, timeout, start_period, and start_interval are specified as durations.
  if "interval" in healthcheck:
  podman_args.extend(["--health-interval", healthcheck["interval"]])
  if "timeout" in healthcheck:
  podman_args.extend(["--health-timeout", healthcheck["timeout"]])
  if "start_period" in healthcheck:
  podman_args.extend(["--health-start-period", healthcheck["start_period"]])
+ if "start_interval" in healthcheck:
+ podman_args.extend(["--health-startup-interval", healthcheck["start_interval"]])
 
  # convert other parameters to string
  if "retries" in healthcheck: