Ignore none existing fragment for back compat

docker-compose-generator/src/DockerComposeDefinition.cs

@@ -43,9 +43,17 @@ namespace DockerGenerator
 
 			Console.WriteLine($"With fragments:");
 			foreach (var fragment in Fragments)
+			{
+				var fragmentPath = GetFragmentLocation(fragment);
+				if (!File.Exists(fragmentPath))
+				{
+					Console.WriteLine($"\t{fragment} not found in {fragmentPath}, ignoring...");
+				}
+				else
 				{
 					Console.WriteLine($"\t{fragment}");
 				}
+			}
 			var services = new List<KeyValuePair<YamlNode, YamlNode>>();
 			var volumes = new List<KeyValuePair<YamlNode, YamlNode>>();
 
@@ -144,10 +152,15 @@ namespace DockerGenerator
 
 		private YamlMappingNode ParseDocument(string fragment)
 		{
-            var input = new StringReader(File.ReadAllText(Path.Combine(FragmentLocation, $"{fragment}.yml")));
+			var input = new StringReader(File.ReadAllText(GetFragmentLocation(fragment)));
 			YamlStream stream = new YamlStream();
 			stream.Load(input);
 			return (YamlMappingNode)stream.Documents[0].RootNode;
 		}
+
+		private string GetFragmentLocation(string fragment)
+		{
+			return Path.Combine(FragmentLocation, $"{fragment}.yml");
+		}
 	}
 }