Add the packaging metadata to build the node snap

snap/snapcraft.yaml

@@ -0,0 +1,26 @@
+name: node
+version: v8.5.0
+summary: Node.js JavaScript runtime
+description: |
+  Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine.
+  Node.js uses an event-driven, non-blocking I/O model that makes it
+  lightweight and efficient. The Node.js package ecosystem, npm, is the
+  largest ecosystem of open source libraries in the world.
+
+grade: devel # must be 'stable' to release into candidate/stable channels
+confinement: classic
+
+apps:
+  node:
+    command: bin/node
+  npm:
+    command: bin/npm
+
+parts:
+  node:
+    source: https://github.com/nodejs/node.git
+    source-tag: v8.5.0
+    plugin: autotools
+    build-packages: [g++, clang, python]
+    organize:
+      usr/local: .