gh-8 Start listener

Signed-off-by: Victor Chang <[email protected]>

Author: mocsharp

.github/containerscan/allowedlist.yaml

@@ -0,0 +1,3 @@
+general:
+  vulnerabilities:
+    - CVE-2018-8292

src/InformaticsGateway/Services/HealthLevel7/MllpService.cs

@@ -64,6 +64,7 @@ public Task StartAsync(CancellationToken cancellationToken)
         {
             var task = Task.Run(async () =>
             {
+                _tcpListener.Start();
                 await BackgroundProcessing(cancellationToken).ConfigureAwait(true);
             }, CancellationToken.None);
 
@@ -90,7 +91,6 @@ private async Task BackgroundProcessing(CancellationToken cancellationToken)
                 try
                 {
                     WaitUntilAvailable(_configuration.Value.Hl7.MaximumNumberOfConnections);
-
                     var client = await _tcpListener.AcceptTcpClientAsync(cancellationToken).ConfigureAwait(false);
                     _logger.ClientConnected();