Set up App Service

Login to your azure account.
Create a Linux App Service with the .NET Core 3.1 runtime stack.
Go to the newly created App Service’s Configuration and click on the Advanced Edit.

Copy & Paste the JSON content below into the configuration JSON editor, which appears on a pane. Click on OK to save.

You will fill in the missing configuration values later. Note that the initial JSON content in the editor may “[ ].” Please remove this before adding the content below.

[
  {
    "name": "AzRedisCache",
    "value": "",
    "slotSetting": false
  },
  {
    "name": "CosmosDbAuthKey",
    "value": "",
    "slotSetting": false
  },
  {
    "name": "CosmosDbContainerId",
    "value": "",
    "slotSetting": false
  },
  {
    "name": "CosmosDbDatabaseId",
    "value": "",
    "slotSetting": false
  },
  {
    "name": "CosmosDbEndpoint",
    "value": "",
    "slotSetting": false
  },
  {
    "name": "EnableMultitenancy",
    "value": "true",
    "slotSetting": false
  },
  {
    "name": "KeyVaultUrl",
    "value": "",
    "slotSetting": false
  },
  {
    "name": "MicrosoftAppId",
    "value": "",
    "slotSetting": false
  },
  {
    "name": "MicrosoftAppPassword",
    "value": "",
    "slotSetting": false
  },
  {
    "name": "SupportsUserTenantMapping",
    "value": "false",
    "slotSetting": false
  },
  {
    "name": "WEBSITE_HEALTHCHECK_MAXPINGFAILURES",
    "value": "10",
    "slotSetting": false
  },
  {
    "name": "WEBSITE_HTTPLOGGING_RETENTION_DAYS",
    "value": "2",
    "slotSetting": false
  },
  {
    "name": "WEBSITE_LOAD_USER_PROFILE",
    "value": "1",
    "slotSetting": false
  }
]

The Application settings page will appear as below. Click on the Save button to save the settings.