Update deprecated dependencies

fpm/Dockerfile

@@ -20,11 +20,11 @@ RUN apt-get update && apt-get install -y \
     && docker-php-ext-configure gd --with-freetype-dir=/usr/include/ --with-jpeg-dir=/usr/include/ \
     && docker-php-ext-install -j$(nproc) gd
 
-# ssmtp
-RUN DEBIAN_FRONTEND=noninteractive apt-get install -y ssmtp
+# msmtp
+RUN DEBIAN_FRONTEND=noninteractive apt-get install -y msmtp
 
 # mysql-client
-RUN apt-get update && apt-get install -y mysql-client && rm -rf /var/lib/apt
+RUN apt-get update && apt-get install -y default-mysql-client && rm -rf /var/lib/apt
 
 # Xdebug
 RUN pecl install xdebug-2.5.0 \
@@ -36,7 +36,7 @@ RUN chmod 777 /usr/local/etc/php/conf.d/xdebug.ini
 RUN curl -sS https://getcomposer.org/installer | php -- --install-dir=/usr/local/bin --filename=composer
 
 # Node.js
-RUN curl -sL https://deb.nodesource.com/setup_8.x | sudo -E bash -
+RUN curl -sL https://deb.nodesource.com/setup_11.x | sudo -E bash -
 RUN apt-get install -y nodejs
 
 # Gulp

fpm/custom.ini

@@ -1,4 +1,4 @@
-sendmail_path = /usr/sbin/ssmtp -t
+sendmail_path = /usr/sbin/msmtp -t
 memory_limit = 2048M
 max_input_vars = 50000
 max_execution_time = 0