add install from source example dockerfile

Author: christopherhesse

README.md

@@ -83,6 +83,13 @@ docker build docker --tag procgen
 docker run --rm -it procgen python3 -m procgen.examples.random_agent_gym
 ```
 
+There is a second `Dockerfile` to demonstrate installing from source:
+
+```
+docker build . --tag procgen --file docker/Dockerfile.dev
+docker run --rm -it procgen python -c "from procgen import ProcgenGym3Env; env = ProcgenGym3Env(num=1, env_name='coinrun'); print(env.observe())"
+```
+
 ## Environments
 
 The observation space is a box space with the RGB pixels the agent sees in a numpy array of shape (64, 64, 3).  The expected step rate for a human player is 15 Hz.

docker/Dockerfile.dev

@@ -0,0 +1,11 @@
+# This Dockerfile demonstrates the "Install from Source" option for using procgen
+FROM ubuntu:bionic-20191202
+RUN apt-get update && apt-get install --yes --no-install-recommends ca-certificates curl build-essential mesa-common-dev libglu1-mesa-dev
+RUN curl -o /tmp/miniconda-installer.sh https://repo.anaconda.com/miniconda/Miniconda3-4.7.12.1-Linux-x86_64.sh
+RUN bash /tmp/miniconda-installer.sh -b -p ~/miniconda
+ADD environment.yml .
+RUN ~/miniconda/bin/conda env update --name dev --file environment.yml
+ENV PATH=/root/miniconda/envs/dev/bin:/root/miniconda/bin:$PATH
+ADD . /procgen
+RUN pip install -e /procgen
+RUN python -c "from procgen import ProcgenGym3Env; ProcgenGym3Env(num=1, env_name='coinrun')"