diff --git a/containers/ruby-2-sinatra/.devcontainer/devcontainer.json b/containers/ruby-2-sinatra/.devcontainer/devcontainer.json
index 319a85b80d..6c10870338 100644
--- a/containers/ruby-2-sinatra/.devcontainer/devcontainer.json
+++ b/containers/ruby-2-sinatra/.devcontainer/devcontainer.json
@@ -5,7 +5,7 @@
 		"rebornix.Ruby"
 	],
 
-	// Uncomment the next line if you want to publish any ports.
+	// Change the port number if you are not using default port in Sinatra
 	"appPort": [4567],
 
 	// Uncomment the next line to run commands after the container is created.
diff --git a/containers/ruby-2-sinatra/.npmignore b/containers/ruby-2-sinatra/.npmignore
new file mode 100644
index 0000000000..1d72d293eb
--- /dev/null
+++ b/containers/ruby-2-sinatra/.npmignore
@@ -0,0 +1,4 @@
+README.md
+test-project
+.vscode
+.npmignore