Update Dockerfile

Co-authored-by: Anna Filina <afilina@gmail.com>

Author: lacatoire

.docker/Dockerfile

@@ -20,7 +20,7 @@ RUN apk add --no-cache \
     pkgconfig \
  && docker-php-ext-install intl xsl
 
-# 📦 Installer Composer
+# 📦 Install Composer
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
 
 # Install PhD and the PHP package (stable compatible version --addpackage)