各位大神好：
在下使用Laravel佈署到GAE後，一直無法連線到自己的SQL SERVER，也確定資料庫可以正常連線，也沒有使用防火牆，想知道是否設定錯誤，請大大們協助，謝謝。

app.yaml

runtime: php72
env_variables:
  APP_KEY: base64:xxxxxxxxxxxxxxxxxxxx
  APP_STORAGE: /tmp
  VIEW_COMPILED_PATH: /tmp
  SESSION_DRIVER: cookie
  DB_CONNECTION: xxxx
  DB_HOST: xxxx
  DB_DATABASE: xxxx
  DB_USERNAME: xx
  DB_PASSWORD:
handlers:
  - url: /(.*\.(css|js|jpg|png|ico|eot|svg|ttf|woff|woff2))$
    static_files: public/\1
    upload: public/.*\.(css|js|jpg|png|ico|eot|svg|ttf|woff|woff2)$

config/database.php

'connections' => [
        'sqlsrv' => [
            'driver' => 'sqlsrv',
            'host' => 'xxxx',
            'username' => 'xxxx',
            'password' => '',
            'database' => 'xxxx',
            'prefix' => '',
        ],
    ],

.env

APP_NAME=XXX
APP_ENV=local
APP_KEY=base64:XXXXX
APP_DEBUG=true
APP_URL=http://localhost
LOG_CHANNEL=stack
DB_CONNECTION=sqlsrv