dockerfile for drone build

docker/Dockerfile.drone

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+FROM php:8.1-fpm-buster
+
+RUN apt update && apt install -y curl git
+
+# https://github.com/mlocati/docker-php-extension-installer
+# https://github.com/mlocati/docker-php-extension-installer#special-requirements
+RUN curl -sSLf -o /usr/local/bin/install-php-extensions \
+        https://github.com/mlocati/docker-php-extension-installer/releases/latest/download/install-php-extensions && \
+    chmod +x /usr/local/bin/install-php-extensions
+
+RUN install-php-extensions opcache redis timezonedb
+
+RUN apt clean autoclean && \
+    apt autoremove -y && \
+    rm -rf /var/lib/apt/lists/*
+
+RUN usermod -u 1000 www-data && groupmod -g 1000 www-data
+RUN chown -R www-data:www-data /var/www
+
+RUN mv "$PHP_INI_DIR/php.ini-production" "$PHP_INI_DIR/php.ini"
+COPY zz-custom-php.ini "$PHP_INI_DIR/conf.d/"
+COPY zz-custom-phpfpm.conf /usr/local/etc/php-fpm.d/zz-docker.conf
+
+COPY /drone/src/frontend/build /var/www/frontend
+COPY /drone/src/backend /var/www/backend