Based on wordpress:php7.2-fpm-alpine from official WordPress but with configurable UID and GID for www-data. The container itself is still ran as root. WordPress installation is NOT included and should be installed separately with Composer. In addition the image includes wp-cli.
Dockerfile installs shadow for usermod and groupmod command and defaults for UID and GID 1000. Also docker-entrypoint.sh file has been modified to take new values on runtime. Use environment variables PUID and PGID to override the defaults.
PHP configuration defaults to the provided php.ini-production. Use environment variables PHP_UPLOAD_MAX_FILESIZE and PHP_POST_MAX_SIZE to override upload_max_filesize and post_max_size.
docker run -it --rm -e PUID=1001 -e PGID=1234 strathos/php-for-wordpress:7.2-fpm-alpine-uid bash