Configure Gitpod prebuilds.

Author: Mike Nikles

.gitpod.yml

@@ -1,4 +1,4 @@
-
+# For more details, please see https://www.gitpod.io/docs/references/gitpod-yml
 tasks:
   - init: npm install
     command: |
@@ -11,4 +11,10 @@ ports:
 
 vscode:
   extensions:
-    - svelte.svelte-vscode
+    - svelte.svelte-vscode
+
+github:
+  prebuilds:
+    master: true
+    branches: true
+    pullRequests: true