Merge pull request #40 from PatchRanger/#39-fix_installation_error

Fix #39

Author: Maxlab

conf/php7console/Dockerfile

@@ -23,7 +23,7 @@ RUN apt-get install -y libbz2-dev
 RUN docker-php-ext-install bz2
 
 # gd
-RUN apt-get install -y libfreetype6-dev libjpeg62-turbo-dev libpng12-dev
+RUN apt-get install -y libfreetype6-dev libjpeg62-turbo-dev libpng-dev
 RUN docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/
 RUN docker-php-ext-install gd
 
@@ -75,7 +75,7 @@ RUN apt-get install -y \
         libfreetype6-dev \
         libjpeg62-turbo-dev \
         libmcrypt-dev \
-        libpng12-dev \
+        libpng-dev \
         msmtp \
         imagemagick \
         libssl-dev \

conf/php7xdebug/Dockerfile

@@ -20,7 +20,7 @@ RUN apt-get install -y libbz2-dev
 RUN docker-php-ext-install bz2
 
 # gd
-RUN apt-get install -y libfreetype6-dev libjpeg62-turbo-dev libpng12-dev
+RUN apt-get install -y libfreetype6-dev libjpeg62-turbo-dev libpng-dev
 RUN docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/
 RUN docker-php-ext-install gd
 
@@ -74,7 +74,7 @@ RUN apt-get install -y \
         libfreetype6-dev \
         libjpeg62-turbo-dev \
         libmcrypt-dev \
-        libpng12-dev \
+        libpng-dev \
         msmtp \
         imagemagick \
         libssl-dev \