Description
Is your feature request related to a problem? Please describe.
Users may run docker:// containers, be surprised when the lack of $HOME isolation etc. impacts behavior, and not understand which flags are needed to resolve issues.
Describe the solution you'd like
By default, SingularityCE runs containers far less isolated from the host than Docker - relying on system restrictions on the user. This is very convenient for traditional HPC-like jobs, but some Docker containers can have conflicts with files and other things that enter the container from the host. We have a number of flags such as --contain to work around this, but it’s often unclear which are needed. A shortcut to apply the most ‘docker-like’, but practical configuration would be useful.
Describe alternatives you've considered
Documentation improvements could assist the issue by providing better guidance, but a single flag for docker like behavior is a more accessible solution.