+ php56 things

src/dockerfiles/php-fpm/php.base56.Dockerfile

@@ -103,8 +103,7 @@ RUN if [ ${INSTALL_BCMATH} = true ]; then \
 # Locales:
 ###########################################################################
 
-RUN apt --allow-releaseinfo-change update && \
-    apt install -y locales && \
+RUN apt install -y locales && \
     sed -i 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/' /etc/locale.gen && \
     sed -i 's/# ru_RU.UTF-8 UTF-8/ru_RU.UTF-8 UTF-8/' /etc/locale.gen && \
     locale-gen

src/dockerfiles/php-fpm/php56.Dockerfile

@@ -0,0 +1,7 @@
+# syntax = edrevo/dockerfile-plus
+FROM php:5.6-fpm
+
+INCLUDE+ ./php.base56.Dockerfile
+
+RUN docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ --with-webp-dir=/usr/include/ \
+    && docker-php-ext-install -j$(nproc) gd