add configuration for mailcatcher

3 jobs for master in 43 seconds (queued for 2 seconds)
Name Stage Failure
failed
build71 Build
 ---> 2b4fd2ffd5bf
Step 7/11 : 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
---> Running in 05a06a7ea486
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package ssmtp
The command '/bin/sh -c 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' returned a non-zero code: 100
ERROR: Job failed: command terminated with exit code 100
failed
build72 Build
 ---> 519cc8e0781d
Step 7/11 : 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
---> Running in fc81e9f45916
Reading package lists...
Building dependency tree...
Reading state information...
E: Unable to locate package ssmtp
The command '/bin/sh -c 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' returned a non-zero code: 100
ERROR: Job failed: command terminated with exit code 100