add configuration for mailcatcher

5.6/Dockerfile

@@ -28,7 +28,7 @@ RUN apt-get update && \
     docker-php-ext-install -j$(getconf _NPROCESSORS_ONLN) gd bcmath soap gettext mcrypt mysqli pdo_mysql opcache xsl zip intl calendar && \
     apt-get remove -y libfreetype6-dev libpng-dev libjpeg62-turbo-dev libmcrypt-dev libxslt1-dev libicu-dev
 
-RUN apt-get install ssmtp && \
+RUN apt-get install -y ssmtp && \
     echo "mailhub=mailcatcher:1025\nUseTLS=NO\nFromLineOverride=YES" > /etc/ssmtp/ssmtp.conf && \
     echo "sendmail_path = /usr/sbin/ssmtp -t" > /usr/local/etc/php/conf.d/sendmail.ini
 

7.1/Dockerfile

@@ -27,7 +27,7 @@ RUN apt-get update && \
     apt-get remove -y libfreetype6-dev libpng-dev libjpeg62-turbo-dev libmcrypt-dev libxslt1-dev libicu-dev && \
     rm -rf /var/lib/apt/lists/*
 
-RUN apt-get install ssmtp && \
+RUN apt-get install -y ssmtp && \
     echo "mailhub=mailcatcher:1025\nUseTLS=NO\nFromLineOverride=YES" > /etc/ssmtp/ssmtp.conf && \
     echo "sendmail_path = /usr/sbin/ssmtp -t" > /usr/local/etc/php/conf.d/sendmail.ini
 

7.2/Dockerfile

@@ -29,7 +29,7 @@ RUN apt-get update && \
     apt-get remove -y libfreetype6-dev libpng-dev libjpeg62-turbo-dev libmcrypt-dev libxslt1-dev libicu-dev && \
     rm -rf /var/lib/apt/lists/*
 
-RUN apt-get install ssmtp && \
+RUN apt-get install -y ssmtp && \
     echo "mailhub=mailcatcher:1025\nUseTLS=NO\nFromLineOverride=YES" > /etc/ssmtp/ssmtp.conf && \
     echo "sendmail_path = /usr/sbin/ssmtp -t" > /usr/local/etc/php/conf.d/sendmail.ini