Add Heroku generated app.json

Author: slaymance

app.json

@@ -0,0 +1,25 @@
+{
+  "name": "SPLASM",
+  "description": "Auto review changes to staging on pull requests",
+  "scripts": {
+  },
+  "env": {
+    "CLEARDB_DATABASE_URL": {
+      "required": true
+    },
+    "MONGODB_URI": {
+      "required": true
+    }
+  },
+  "formation": {
+  },
+  "addons": [
+    "cleardb",
+    "mongolab"
+  ],
+  "buildpacks": [
+    {
+      "url": "heroku/nodejs"
+    }
+  ]
+}