Add support for Additional fragment to the builder

docker-compose-generator/src/Program.cs

@@ -92,6 +92,11 @@ namespace DockerGenerator
                 }
             }
 
+            foreach(var fragment in composition.AdditionalFragments)
+            {
+                fragments.Add(fragment.Trim());
+            }
+
 			var def = new DockerComposeDefinition(name, fragments);
 			def.FragmentLocation = fragmentLocation;
 			def.BuildOutputDirectory = output;