[one] Update to PHP 8 (#6188)

frameworks/PHP/one/one.dockerfile

@@ -1,9 +1,9 @@
-FROM php:7.4
+FROM php:8.0-cli
 
 RUN pecl install swoole > /dev/null && \
     docker-php-ext-enable swoole
 
-RUN docker-php-ext-install pdo_mysql > /dev/null
+RUN docker-php-ext-install opcache pdo_mysql > /dev/null
 
 RUN apt -yqq update > /dev/null && \
     apt -yqq install git unzip > /dev/null