start.sh

#!/bin/sh
# 将环境变量的内容写入凭证文件
# echo $GOOGLE_APPLICATION_CREDENTIALS_JSON
echo $GOOGLE_APPLICATION_CREDENTIALS_JSON > /app/keys/google-cloud-text-to-speech-key.json

# 启动 Flask 应用
exec flask run --host=0.0.0.0 --port=7680