merged d7 and d8 dockers

Docker/php-legacy/Dockerfile

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+FROM php:5.6-fpm
+
+
+RUN apt-get update && apt-get install -y \
+		libfreetype6-dev \
+		libjpeg62-turbo-dev \
+    libmcrypt-dev \
+		libpng-dev \
+		mysql-client \
+    zip && \
+		docker-php-ext-install -j$(nproc) iconv mcrypt && \
+		docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ && \
+		docker-php-ext-install -j$(nproc) gd && \
+		docker-php-ext-install pdo_mysql zip && \
+		docker-php-ext-install opcache && \
+		apt-get install -y git vim && \
+		pecl install redis-3.1.0 && \
+    pecl install xdebug-2.5.0 && \
+    docker-php-ext-enable redis xdebug && \
+		export COMPOSER_HOME=/usr/local/composer && \
+	    curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer && \
+	    composer global require drush/drush:8 && \
+	    composer global install && \
+	    ln -s /usr/local/composer/vendor/drush/drush/drush /usr/local/bin/drush
+
+COPY ./php-custom.ini /usr/local/etc/php/conf.d/php-custom.ini
+
+COPY ./bashrc /root/.bashrc
+COPY ./inputrc /root/.inputrc

Docker/php-legacy/bashrc

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+
+PS1='\e[36m\e[1mPHP\e[0m:\e[90m\w\e[0m\n$ '
+bind '"\e[A": history-search-backward'
+bind '"\e[B": history-search-forward'

Docker/php-legacy/inputrc

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+set show-all-if-ambiguous on
+set completion-ignore-case on

Docker/php-legacy/php-custom.ini

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+memory_limit = 526M