Improved Docker Instructions (#11)

Moved multiple `RUN` instructions into one. This will reduce the number of layers.

Also, I added `rm -rf /var/lib/apt/lists/*` to remove unnecessary data.

Dockerfile-71

@@ -18,34 +18,28 @@ MAINTAINER Mahmoud Zalt <[email protected]>
 
 # Install "curl", "libmemcached-dev", "libpq-dev", "libjpeg-dev",
 #         "libpng12-dev", "libfreetype6-dev", "libssl-dev", "libmcrypt-dev",
-RUN apt-get update && \
-    apt-get install -y --no-install-recommends \
-        curl \
-        libmemcached-dev \
-        libz-dev \
-        libpq-dev \
-        libjpeg-dev \
-        libpng12-dev \
-        libfreetype6-dev \
-        libssl-dev \
-        libmcrypt-dev
+RUN apt-get update \
+  && apt-get install -y --no-install-recommends \
+    curl \
+    libmemcached-dev \
+    libz-dev \
+    libpq-dev \
+    libjpeg-dev \
+    libpng12-dev \
+    libfreetype6-dev \
+    libssl-dev \
+    libmcrypt-dev \
+  && rm -rf /var/lib/apt/lists/*
 
 # Install the PHP mcrypt extention
-RUN docker-php-ext-install mcrypt
-
-# Install the PHP pdo_mysql extention
-RUN docker-php-ext-install pdo_mysql
-
-# Install the PHP pdo_pgsql extention
-RUN docker-php-ext-install pdo_pgsql
-
-#####################################
-# gd:
-#####################################
-
-# Install the PHP gd library
-RUN docker-php-ext-configure gd \
-        --enable-gd-native-ttf \
-        --with-jpeg-dir=/usr/lib \
-        --with-freetype-dir=/usr/include/freetype2 && \
+RUN docker-php-ext-install mcrypt \
+  # Install the PHP pdo_mysql extention
+  && docker-php-ext-install pdo_mysql \
+  # Install the PHP pdo_pgsql extention
+  && docker-php-ext-install pdo_pgsql \
+  # Install the PHP gd library
+  && docker-php-ext-configure gd \
+    --enable-gd-native-ttf \
+    --with-jpeg-dir=/usr/lib \
+    --with-freetype-dir=/usr/include/freetype2 && \
     docker-php-ext-install gd