Update Dockerfile

Fixing missing `\` on line ends

Dockerfile

@@ -7,7 +7,7 @@ ENV COMPOSER_NO_INTERACTION 1
 
 # Add Node.js repo
 RUN \
- curl -sL https://deb.nodesource.com/setup_8.x | bash -
+ curl -sL https://deb.nodesource.com/setup_8.x | bash - \
  && apt-get install --no-install-recommends -y \
  curl \
  nodejs \
@@ -26,6 +26,6 @@ RUN \
  # Show versions
  && php -v && node -v && npm -v \
  # Install composer
- && curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
+ && curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer \
  && composer selfupdate