Edit file File name : Dockerfile Content :FROM php:5.6.25 RUN apt-get update && apt-get install -y build-essential zip unzip ENV APP_HOME /braintree_php_example RUN mkdir $APP_HOME WORKDIR $APP_HOME ADD composer.* $APP_HOME/ RUN php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');" && php composer-setup.php && php composer.phar install ADD . $APP_HOME Save