feat: Use typed exception for node not in swarm and node already in swarm

src/Docker.DotNet/Endpoints/DockerSwarmNodeAlreadyParticipatingException.cs

@@ -0,0 +1,9 @@
+namespace Docker.DotNet;
+
+public class DockerSwarmNodeAlreadyParticipatingException : DockerApiException
+{
+    public DockerSwarmNodeAlreadyParticipatingException(HttpStatusCode statusCode, string? responseBody)
+        : base(statusCode, responseBody)
+    {
+    }
+}

src/Docker.DotNet/Endpoints/DockerSwarmNodeNotParticipatingException.cs

@@ -0,0 +1,9 @@
+namespace Docker.DotNet;
+
+public class DockerSwarmNodeNotParticipatingException : DockerApiException
+{
+    public DockerSwarmNodeNotParticipatingException(HttpStatusCode statusCode, string? responseBody)
+        : base(statusCode, responseBody)
+    {
+    }
+}

src/Docker.DotNet/Endpoints/SwarmOperations.cs

@@ -6,17 +6,15 @@ internal class SwarmOperations : ISwarmOperations
     {
         if (statusCode == HttpStatusCode.ServiceUnavailable)
         {
-            // TODO: Make typed error.
-            throw new Exception("Node is not part of a swarm.");
+            throw new DockerSwarmNodeNotParticipatingException(statusCode, responseBody);
         }
     };
 
     private static readonly ApiResponseErrorHandlingDelegate AlreadyInSwarmResponseHandler = (statusCode, responseBody) =>
     {
         if (statusCode == HttpStatusCode.ServiceUnavailable)
         {
-            // TODO: Make typed error.
-            throw new Exception("Node is already part of a swarm.");
+            throw new DockerSwarmNodeAlreadyParticipatingException(statusCode, responseBody);
         }
     };
 

test/Docker.DotNet.Tests/TestFixture.cs

@@ -93,7 +93,7 @@ await DockerClient.Images.CreateImageAsync(new ImagesCreateParameters { FromImag
 
             _hasInitializedSwarm = true;
         }
-        catch
+        catch (DockerSwarmNodeAlreadyParticipatingException)
         {
             this.LogInformation("Couldn't init a new swarm, the node should take part of an existing one.");