Use docker command to enable pcov

Author: ajoy39

php-fpm/Dockerfile

@@ -176,8 +176,7 @@ RUN if [ ${INSTALL_PCOV} = true ]; then \
   if [ $(php -r "echo PHP_MAJOR_VERSION;") = "7" ]; then \
     if [ $(php -r "echo PHP_MINOR_VERSION;") != "0" ]; then \
       pecl install pcov && \
-      echo "extension=pcov.so" >> /etc/php/${LARADOCK_PHP_VERSION}/cli/php.ini && \
-      echo "pcov.enabled" >> /etc/php/${LARADOCK_PHP_VERSION}/cli/php.ini \
+      docker-php-ext-enable pcov \
     ;fi \
   ;fi \
 ;fi