Bicep App Service · Azure App Onboard · microsoft/azure-skills · Skills Docs

Bicep App Service · Azure App Onboard · microsoft/azure-skills · Skills Docs

param location string
param tags object
param appServicePlanId string
param appServiceName string

resource appService 'Microsoft.Web/sites@2023-12-01' = {
  name: appServiceName
  location: location
  tags: tags
  identity: {
    type: 'SystemAssigned'
  }
  properties: {
    serverFarmId: appServicePlanId
    httpsOnly: true
    siteConfig: {
      minTlsVersion: '1.2'
      ftpsState: 'Disabled'
    }
  }
}

// SCM basic auth — enabled in IaC for deploy convenience. Deploy phase re-disables via REST API after code upload.
resource scmAuth 'Microsoft.Web/sites/basicPublishingCredentialsPolicies@2023-12-01' = {
  parent: appService
  name: 'scm'
  properties: {
    allow: true
  }
}

// ⛔ MANDATORY — disable FTP basic auth
resource ftpAuth 'Microsoft.Web/sites/basicPublishingCredentialsPolicies@2023-12-01' = {
  parent: appService
  name: 'ftp'
  properties: {
    allow: false
  }
}

output appServiceId string = appService.id
output principalId string = appService.identity.principalId

resource appService 'Microsoft.Web/sites@2023-12-01' = {
  name: appServiceName
  location: location
  tags: tags
  properties: {
    serverFarmId: appServicePlan.id
    httpsOnly: true
    siteConfig: {
      linuxFxVersion: 'NODE|${nodeVersion}' // ⛔ Use exact version tag (18-lts, 20-lts) — NEVER tilde (~18). Tilde works for WEBSITE_NODE_DEFAULT_VERSION but NOT linuxFxVersion.
      ftpsState: 'Disabled'
      minTlsVersion: '1.2'
      // Startup command: Oryx build is primary, this is the safety-net fallback.
      // Runs npm install only if node_modules doesn't exist (Oryx missed it).
      // MUST be inline — never a .sh file (Windows CRLF → bash exit code 2).
      appCommandLine: '${deployStrategy.startupCommand}'
      appSettings: [
        // Primary: tell Oryx to run npm install during zip deploy
        { name: 'SCM_DO_BUILD_DURING_DEPLOYMENT', value: 'true' }
        { name: 'ENABLE_ORYX_BUILD', value: 'true' }
        // Extended timeout for native module compilation (max 1800, default 230)
        { name: 'WEBSITES_CONTAINER_START_TIME_LIMIT', value: '1800' }
        // App-specific settings
        { name: 'NODE_ENV', value: 'production' }
      ]
    }
  }
}