Add key details about running in docker

[snyff]

When running ysoserial in docker the option --tty=false should be used to avoid \0d being added before any \0a in the payload.

[frohoff]

Isn't the default --tty=false for docker run?

$ man docker run | grep -A1 -- "--tty="
       -t, --tty=true|false
          Allocate a pseudo-TTY. The default is false.

[hackycorpdev]

Yes it is off by default but some idiot (me) may be so used to use -it that he may lose a day of work :/ Just thought that would help someone else, feel free to ignore