added a conda dockerfile

docker/Dockerfile.conda

@@ -0,0 +1,20 @@
+FROM condaforge/miniforge3:latest
+
+RUN apt-get update && \
+    apt-get install -y \
+    vim \
+    protobuf-compiler \
+    && apt update
+
+RUN curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain nightly -y
+
+RUN mkdir /workspace
+
+WORKDIR /workspace
+
+# NOTE: `conda` is ignore in .dockerignore, so doesn't work
+#       but you *can* `docker run -v .:/workspace`
+# ADD conda /workspace/
+# RUN conda env create -f ./conda/environments/datafusion-dev.yaml -n datafusion-dev
+
+CMD ["/bin/sh", "-c", "bash"]