updated env variables

Author: Mehdi Necibi

Diff for: .github/workflows/deploy_azure.yml

@@ -40,5 +40,5 @@ jobs:
           dns-name-label: threatshield-demo
           image: ${{ secrets.REGISTRY_LOGIN_SERVER }}/threatshield:${{ github.sha }}
           location: ${{ secrets.CONTAINER_INSTANCES_LOCATION }}
-          environment-variables: PHX_SERVER=true
+          environment-variables: PHX_SERVER=true MIX_ENV=prod
           secure-environment-variables: DB_URL="${{ secrets.DB_URL }}" OPENAI_API_KEY="${{ secrets.OPENAI_API_KEY }}" OPENAI_ORG_KEY="${{ secrets.OPENAI_ORG_KEY }}" SECRET_KEY_BASE=${{ secrets.SECRET_KEY_BASE }}