Add testing files for CI system with local docker (See Iain).

docker/chapel-pytorch-test/Dockerfile

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+FROM chapel/chapel
+
+# Install pytorch
+RUN pip3 install torch
+
+# RUN echo "Hello!"
+# RUN echo $(which chpl)
+
+# ADD ./script.sh ./script.sh
+
+WORKDIR /app
+
+COPY ./script.sh script.sh
+COPY . ../../.
+RUN sh script.sh
+
+# CMD ["sh","script.sh"] # Turn off when testing.

docker/chapel-pytorch-test/build-run.sh

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+#!/usr/bin/env bash
+
+docker build --tag 'chapel_pytorch_test' .
+docker run -a STDOUT -a STDERR 'chapel_pytorch_test'
+
+# terminal cmd: sh build-run.sh && docker run -it 'chapel_pytorch_test'
+#     when testing and output of Dockerfile could be unreliable. Having
+#     this allows you to see the environment produced by the Dockerfile!

docker/chapel-pytorch-test/script.sh

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+#!/usr/bin/env bash
+
+echo "Hello!"
+
+echo $(which chpl)
+
+echo $(which python3 || echo "No 'python3' found!")