Have Pants ignore some directories in Pulumi container
I'm not clear what changed between Pants versions to require this
change, but things were failing because `pulumi` (or *anything*,
really) wasn't being installed in the virtualenv.
@@ -66,7 +66,7 @@ COPY --chown=grapl pulumi pulumi
# We need to parse the following command with `bash`, not `sh`
SHELL ["/bin/bash", "-c"]
-RUN pip install -r <(./pants dependencies --type=3rdparty pulumi::)
+RUN pip install -r <(PANTS_IGNORE='[".pex",".cache","venv"]' ./pants dependencies --type=3rdparty pulumi::)
# Create a directory *as the grapl user*, at which we will mount an
# external volume to share Pulumi run outputs with other
