apt-get update just need run at first, after add-apt-repository or update apt source list.

workspace/Dockerfile-56

@@ -47,8 +47,8 @@ MAINTAINER Mahmoud Zalt <mahmoud@zalt.me>
 ARG PUID=1000
 ARG PGID=1000
 RUN groupadd -g $PGID laradock && \
-    useradd -u $PUID -g laradock -m laradock
-
+    useradd -u $PUID -g laradock -m laradock && \
+    apt-get update -yqq
 
 #####################################
 # SOAP:
@@ -60,8 +60,8 @@ ENV INSTALL_SOAP ${INSTALL_SOAP}
 
 RUN if [ ${INSTALL_SOAP} = true ]; then \
   # Install the PHP SOAP extension
-  apt-get -y update && \
   add-apt-repository -y ppa:ondrej/php && \
+  apt-get update -yqq && \
   apt-get -y install libxml2-dev php5.6-soap \
 ;fi
 
@@ -128,7 +128,6 @@ RUN echo "" >> ~/.bashrc && \
 ARG INSTALL_XDEBUG=false
 RUN if [ ${INSTALL_XDEBUG} = true ]; then \
     # Load the xdebug extension only with phpunit commands
-    apt-get update && \
     apt-get install -y --force-yes php5.6-xdebug && \
     sed -i 's/^/;/g' /etc/php/5.6/cli/conf.d/20-xdebug.ini && \
     echo "alias phpunit='php -dzend_extension=xdebug.so /var/www/vendor/bin/phpunit'" >> ~/.bashrc \
@@ -150,7 +149,7 @@ ENV BLACKFIRE_CLIENT_TOKEN ${BLACKFIRE_CLIENT_TOKEN}
 RUN if [ ${INSTALL_XDEBUG} = false -a ${INSTALL_BLACKFIRE} = true ]; then \
     curl -L https://packagecloud.io/gpg.key | apt-key add - && \
     echo "deb http://packages.blackfire.io/debian any main" | tee /etc/apt/sources.list.d/blackfire.list && \
-    apt-get update && \
+    apt-get update -yqq && \
     apt-get install blackfire-agent \
 ;fi
 
@@ -354,7 +353,6 @@ ENV INSTALL_LINUXBREW ${INSTALL_LINUXBREW}
 RUN if [ ${INSTALL_LINUXBREW} = true ]; then \
 
     # Preparation
-    apt-get update && \
     apt-get upgrade -y && \
     apt-get install -y build-essential make cmake scons curl git \
       ruby autoconf automake autoconf-archive \