Add delay between nginx crashes (#5852)

Added a delay between nginx restarts to avoid spamming the log file.

## Azure IoT Edge PR checklist:

edge-modules/api-proxy-module/src/main.rs

@@ -19,6 +19,7 @@ use tokio::{
  process::{Child, Command},
  sync::Notify,
  task::JoinHandle,
+ time,
 };
 
 use api_proxy_module::{
@@ -28,6 +29,8 @@ use api_proxy_module::{
 };
 use shutdown_handle::ShutdownHandle;
 
+const MAX_LOOP_INTERVAL_SECONDS: tokio::time::Duration = tokio::time::Duration::from_secs(1);
+
 #[tokio::main]
 async fn main() -> Result<()> {
  env_logger::builder().filter_level(LevelFilter::Info).init();
@@ -188,6 +191,10 @@ pub fn nginx_controller_start(
  return Ok(());
  }
  }
+
+ // This delay controls how fast the main loop can reconnect once nginx crashed.
+ // Without this, nginx crashes and restart continuously. Rapidly increasing the size of the logs.
+ time::sleep(MAX_LOOP_INTERVAL_SECONDS);
  }
  }
  });