Clean code

Dockerfile

@@ -18,8 +18,9 @@ RUN apt-get update \
         libfreetype6-dev \
         libxml2-dev \
         libonig-dev \
+        libicu-dev \
     && docker-php-ext-configure gd --with-freetype --with-jpeg --with-webp \
-    && docker-php-ext-install -j"$(nproc)" pdo_sqlite dom gd mbstring opcache \
+    && docker-php-ext-install -j"$(nproc)" pdo_sqlite dom gd mbstring opcache intl \
     && printf 'ServerName localhost\n' > /etc/apache2/conf-available/servername.conf \
     && a2enconf servername \
     && rm -rf /var/lib/apt/lists/*