Fixes #1875 - add additional extensions to Dockerfile

Dockerfile

@@ -8,6 +8,12 @@ RUN composer install --optimize-autoloader --prefer-dist --no-progress --no-inte
 FROM php:8.2-cli-alpine AS phing
 MAINTAINER Phing <[email protected]>
 
+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 && \
+    install-php-extensions gettext intl sockets tidy xsl zip
+
 WORKDIR /app
 
 ADD bin/phing* bin/