Building a Custom URL Shortener Using Azure Functions and Cosmos DB - Adding the URL Redirect Endpoint

function.json

{
  "bindings": [
    {
      "authLevel": "anonymous",
      "type": "httpTrigger",
      "direction": "in",
      "name": "req",
      "methods": ["get"],
      "route": "{vanity}"
    },
    {
      "type": "cosmosDB",
      "direction": "in",
      "name": "registration",
      "databaseName": "registrations",
      "collectionName": "registrations",
      "createIfNotExists": "true",
      "connectionStringSetting": "RegistrationsDB",
      "collectionThroughput": "400",
      "partitionKey": "{vanity}",
      "id": "{vanity}"
    },
    {
      "type": "http",
      "direction": "out",
      "name": "res"
    }
  ]
}