Add additional PHP extensions and system dependencies to Dockerfile

apache/Dockerfile

@@ -23,6 +23,9 @@ RUN --mount=type=cache,target=/var/cache/apt \
     libzip-dev \
     zip \
     unzip \
+    zlib1g-dev \
+    libicu-dev \
+    g++ \
     nodejs \
     npm \
     cron \
@@ -51,6 +54,8 @@ RUN --mount=type=cache,target=/var/cache/apt \
 # Enable Apache mod_rewrite for URL rewriting
 RUN a2enmod rewrite
 
+RUN docker-php-ext-configure intl
+
 # Install PHP extensions
 RUN docker-php-ext-install \
     pdo_mysql \
@@ -62,7 +67,8 @@ RUN docker-php-ext-install \
     sockets\
     bcmath \
     soap \
-    gd
+    gd \
+    intl
 
 RUN docker-php-ext-enable imagick