webapp appsettings gets overwritten

When we try to send app settings dynamically, following settings gets overwritten.

APPINSIGHTS_INSTRUMENTATIONKEY
WEBSITE_HTTPLOGGING_CONTAINER_URL
WEBSITE_HTTPLOGGING_RETENTION_DAYS

```

"resources": [
{
"apiVersion": "2018-02-01",
"type": "Microsoft.Web/sites",
"name": "[parameters('appName')]",
"location": "[resourceGroup().location]",
"tags": "[parameters('tags')]",
"dependsOn": [
"[resourceId('Microsoft.Insights/components', parameters('appInsightsName'))]"
],
"identity": {
"type": "[if(equals(parameters('managedServiceIdentity'), 'yes'), 'SystemAssigned', 'None')]"
},
"properties": {
"name": "[parameters('appName')]",
"siteConfig": {
"appSettings": [
{
"name": "APPINSIGHTS_INSTRUMENTATIONKEY",
"value": "[reference(resourceId('Microsoft.Insights/components', parameters('appInsightsName')), '2015-05-01').InstrumentationKey]"
}
],
"metadata": [
{
"name": "CURRENT_STACK",
"value": "[parameters('currentStack')]"
}
]
},
"serverFarmId": "[resourceId(parameters('servicePlanRG'), 'Microsoft.Web/serverfarms',parameters('servicePlanName'))]",
"hostingEnvironment": "[parameters('serviceEnvironmentName')]",
},
"resources": [
{
"apiVersion": "2018-02-01",
"name": "logs",
"type": "config",
"dependsOn": [
"[resourceId('Microsoft.Web/Sites', parameters('appName'))]"
],
"properties": "[variables('logProperties')]"
},
{
"apiVersion": "2015-08-01",
"name": "web",
"type": "config",
"tags": "[parameters('tags')]",
"dependsOn": [
"[resourceId('Microsoft.Web/Sites', parameters('appName'))]"
],
"properties": "[variables('siteProperties')]"
},
{
"apiVersion": "2014-11-01",
"name": "appSettings",
"type": "config",
"dependsOn": [
"[resourceId('Microsoft.Web/Sites', parameters('appName'))]"
],
"properties": "[parameters(appSettings')]"
}
{
"apiVersion": "2014-11-01",
"name": "connectionstrings",
"type": "config",
"dependsOn": [
"[resourceId('Microsoft.Web/Sites', parameters('appName'))]"
],
"properties": "[parameters('connectionStrings')]"
}
]
},
{
"type": "Microsoft.Web/sites/hostnameBindings",
"name": "[concat(parameters('appName'), '/', parameters('dnsName'))]",
"apiVersion": "2016-03-01",
"location": "[resourceGroup().location]",
"properties": {},
"dependsOn": [
"[resourceId('Microsoft.Web/Sites', parameters('appName'))]"
]
},
{
"apiVersion": "2016-08-01",
"type": "Microsoft.Web/sites/slots",
"name": "[variables('slotName')]",
"kind": "app",
"location": "[resourceGroup().location]",
"tags": "[parameters('tags')]",
"properties": {
"serverFarmId": "[resourceId(parameters('servicePlanRG'), 'Microsoft.Web/serverfarms',parameters('servicePlanName'))]"
},
"dependsOn": [
"[resourceId('Microsoft.Web/Sites', parameters('appName'))]"
],
},
{
"apiVersion": "2018-05-01-preview",
"name": "[parameters('appInsightsName')]",
"type": "Microsoft.Insights/components",
"location": "[resourceGroup().location]",
"tags": "[parameters('tags')]",
"properties": {
"ApplicationId": "[parameters('appName')]",
"Request_Source": "IbizaWebAppExtensionCreate"
}
}
]
}
```

Start with the Microsoft.Web/sites resource and its nested config resources, especially the siteConfig.appSettings and appSettings properties shown in the template. Reproduce a deployment using the supplied settings and check which resource writes last. Done means the listed application settings remain intact after deployment.

Written by the indexing model from the issue text.