made usage of 'Dockerfile' consistent as well as 'multi/single-phase'

src/Microsoft.Tye.Core/ContainerInfo.cs

@@ -42,7 +42,7 @@ namespace Microsoft.Tye
         public string? ImageTag { get; set; }
 
         /// <summary>
-        /// Gets or a sets value which determines whether a multiphase dockerfile is used.
+        /// Gets or a sets value which determines whether a multi-phase Dockerfile is used.
         /// </summary>
         public bool? UseMultiphaseDockerfile { get; set; }
     }

src/Microsoft.Tye.Core/DockerContainerBuilder.cs

@@ -44,7 +44,7 @@ namespace Microsoft.Tye
             var dockerFilePath = Path.Combine(application.GetProjectDirectory(project), Path.GetDirectoryName(project.RelativeFilePath)!, "Dockerfile");
             if (File.Exists(dockerFilePath))
             {
-                output.WriteDebugLine($"Using existing dockerfile '{dockerFilePath}'.");
+                output.WriteDebugLine($"Using existing Dockerfile '{dockerFilePath}'.");
             }
             else
             {
@@ -52,7 +52,7 @@ namespace Microsoft.Tye
                 dockerFilePath = tempFile.FilePath;
             }
 
-            // We need to know if this is a single-phase or multi-phase dockerfile because the context directory will be
+            // We need to know if this is a single-phase or multi-phase Dockerfile because the context directory will be
             // different depending on that choice.
             string contextDirectory;
             if (container.UseMultiphaseDockerfile ?? true)
@@ -64,7 +64,7 @@ namespace Microsoft.Tye
                 var publishOutput = service.Outputs.OfType<ProjectPublishOutput>().FirstOrDefault();
                 if (publishOutput is null)
                 {
-                    throw new InvalidOperationException("We should have published the project for a single-phase dockerfile.");
+                    throw new InvalidOperationException("We should have published the project for a single-phase Dockerfile.");
                 }
 
                 contextDirectory = publishOutput.Directory.FullName;

src/Microsoft.Tye.Core/DockerfileGenerator.cs

@@ -48,7 +48,7 @@ namespace Microsoft.Tye
             using var writer = new StreamWriter(stream, encoding: Encoding.UTF8, bufferSize: -1, leaveOpen: true);
 
             var entryPoint = Path.GetFileNameWithoutExtension(project.RelativeFilePath);
-            output.WriteDebugLine($"Writing dockerfile to '{filePath}'.");
+            output.WriteDebugLine($"Writing Dockerfile to '{filePath}'.");
             if (container.UseMultiphaseDockerfile ?? true)
             {
                 await WriteMultiphaseDockerfileAsync(writer, entryPoint, container);
@@ -57,7 +57,7 @@ namespace Microsoft.Tye
             {
                 await WriteLocalPublishDockerfileAsync(writer, entryPoint, container);
             }
-            output.WriteDebugLine("Done writing dockerfile.");
+            output.WriteDebugLine("Done writing Dockerfile.");
         }
 
         private static async Task WriteMultiphaseDockerfileAsync(StreamWriter writer, string applicationEntryPoint, ContainerInfo container)

src/Microsoft.Tye.Core/PublishProjectStep.cs

@@ -8,7 +8,7 @@ using System.Threading.Tasks;
 
 namespace Microsoft.Tye
 {
-    // Used to publish a project when using a single-file dockerfile
+    // Used to publish a project when using a single-phase Dockerfile
     public class PublishProjectStep : ServiceExecutor.Step
     {
         public override string DisplayText => "Publishing Project...";