https://docs.microsoft.com/en-us/azure/app-service/tutorial-nodejs-mongodb-app?pivots=platform-linux

Azure App Service provides a highly scalable, self-patching web hosting service using the Linux operating system. This tutorial shows how to create a Node.js app in App Service on Linux, connect it locally to a MongoDB database, then deploy it to a database in Azure Cosmos DB's API for MongoDB. When you're done, you'll have a MEAN application (MongoDB, Express, AngularJS, and Node.js) running in App Service on Linux. For simplicity, the sample application uses the MEAN.js web framework.

• Create a MongoDB database in Azure
• Connect a Node.js app to MongoDB
• Deploy the app to Azure
• Update the data model and redeploy the app
• Stream diagnostic logs from Azure
• Manage the app in the Azure portal

Note

There is a cost to creating the Azure Cosmos DB databases in this tutorial in your own Azure subscription. To use a free Azure Cosmos DB account for seven days, you can use the Try Azure Cosmos DB for free experience. Just click the Create button in the MongoDB tile to create a free MongoDB database on Azure. Once the database is created, navigate to Connection String in the portal and retrieve your Azure Cosmos DB connection string for use later in the tutorial.

In the Cloud Shell, create an App Service plan in the resource group with the az appservice plan create command.

The following example creates an App Service plan named myAppServicePlan in the Free pricing tier (--sku F1) and in a Linux container (--is-linux).

az appservice plan create --name myAppServicePlan --resource-group myResourceGroup --sku F1 --is-linux

When the App Service plan has been created, the Azure CLI shows information similar to the following example:

{
  "adminSiteName": null,
  "appServicePlanName": "myAppServicePlan",
  "geoRegion": "West Europe",
  "hostingEnvironmentProfile": null,
  "id": "/subscriptions/0000-0000/resourceGroups/myResourceGroup/providers/Microsoft.Web/serverfarms/myAppServicePlan",
  "kind": "linux",
  "location": "West Europe",
  "maximumNumberOfWorkers": 1,
  "name": "myAppServicePlan",
  <JSON data removed for brevity.>
  "targetWorkerSizeId": 0,
  "type": "Microsoft.Web/serverfarms",
  "workerTierName": null
}

Create a web app in the myAppServicePlan App Service plan.

In the Cloud Shell, you can use the az webapp create command. In the following example, replace <app-name> with a globally unique app name (valid characters are a-z, 0-9, and -). The runtime is set to NODE|6.9. To see all supported runtimes, run az webapp list-runtimes --linux.