Updating docker image to use Alpine images instead of Xenial ones. Trying to see if TravisCI panics on ApiTester::send methods on PHP 7.1.9
Updating docker image to use Alpine images instead of Xenial ones. Trying to see if TravisCI panics on ApiTester::send methods on PHP 7.1.9

charlesportwoodii/yii2-api,charlesportwoodii/yii2-api,charlesportwoodii/yii2-api