Add the packaging metadata to build the swagger-ui snap

snapcraft.yaml

@@ -0,0 +1,22 @@
+name: swagger-ui
+version: master
+summary: The World's Most Popular API Framework
+description: |
+  Swagger UI is part of the Swagger project. The Swagger project allows you to
+  produce, visualize and consume your OWN RESTful services. No proxy or 3rd
+  party services required. Do it your own way.
+
+  Swagger UI is a dependency-free collection of HTML, Javascript, and CSS
+  assets that dynamically generate beautiful documentation and sandbox from a
+  Swagger-compliant API. Because Swagger UI has no dependencies, you can host
+  it in any server environment, or on your local machine.
+
+grade: devel
+confinement: strict
+
+parts:
+  swagger-ui:
+    source: .
+    plugin: nodejs
+    npm-run: [build]
+    node-packages: [handlebars]