Add laravel installer for root user (laradock#2176)

workspace/Dockerfile

@@ -124,6 +124,10 @@ COPY ./auth.json /home/laradock/.composer/auth.json
 # Make sure that ~/.composer belongs to laradock
 RUN chown -R laradock:laradock /home/laradock/.composer
 
+# Export composer vendor path
+RUN echo "" >> ~/.bashrc && \
+    echo 'export PATH="$HOME/.composer/vendor/bin:$PATH"' >> ~/.bashrc
+
 USER laradock
 
 # Check if global install need to be ran
@@ -715,6 +719,15 @@ RUN if [ ${INSTALL_LARAVEL_ENVOY} = true ]; then \
 
 USER laradock
 
+ARG INSTALL_LARAVEL_INSTALLER=false
+
+RUN if [ ${INSTALL_LARAVEL_INSTALLER} = true ]; then \
+    # Install the Laravel Installer
+	composer global require "laravel/installer" \
+;fi
+
+USER root
+
 ARG COMPOSER_REPO_PACKAGIST
 ENV COMPOSER_REPO_PACKAGIST ${COMPOSER_REPO_PACKAGIST}