Add required packages to the singularity definition file

[rsuwa]

Updated the ray package in the Singularity definition file because the ray package is out of date and does not work under a Singularity container environment. I also added the missing Python package. It works in conjunction with #7.

I'm sorry for my poor English. 🙇

[jkterry1]

What prompts this line: apt-get install -y libsm6 libxext6?

[jkterry1]

Also, does switching from 8dev2 to 8dev7 change anything for this?

For context, this repo isn't being maintained, so I'm creating an official fork of this that actually works per ray-project/ray#6803.

[jkterry1]

Also, is there a way to specify the python package version in the singularity file?

[rsuwa]

@justinkterry

Also, does switching from 8dev2 to 8dev7 change anything for this?

For context, this repo isn't being maintained, so I'm creating an official fork of this that actually works per ray-project/ray#6803.

In 8dev2, ray.rllib.contrib.maddpg.maddpg is not available.

What prompts this line: apt-get install -y libsm6 libxext6?

Failure to install these packages will result in errors when calling opencv from python.

Also, is there a way to specify the python package version in the singularity file?

You need to add apt-get install python3.x to the Singularity definition file and change this version to be used by default.

[jkterry1]

Sure, but 8.0>8devx, which is what I'm using in the new official repo (https://github.com/justinkterry/maddpg-rllib).

Since when is opencv required by any of this code?