MNT: new Dockerfile for CUDA 11.3

docker/linux-64-cuda-11.3/Dockerfile

+# This image is used for linux-64/cuda 11.3
+# builds of FSL packages.
+
+FROM  nvidia/cuda:11.3-devel-centos7
+LABEL maintainer: "FSL development team <https://fsl.fmrib.ox.ac.uk/fsl/fslwiki/>"
+
+ENV PATH     "/opt/conda/bin:${PATH}"
+ENV CUDA_VER  11.3
+ENV CUDA_HOME /usr/local/cuda
+
+COPY /install_system_deps.sh /install_system_deps.sh
+COPY /install_miniconda.sh   /install_miniconda.sh
+COPY /entrypoint             /fsl-ci-rules-entrypoint
+COPY /environment.yml        /fsl-ci-rules-environment.yml
+
+RUN localedef -i en_GB -f UTF-8 C.UTF-8
+RUN /bin/bash /install_system_deps.sh
+RUN /bin/bash /install_miniconda.sh
+
+ENTRYPOINT [ "/opt/conda/bin/tini", "--", "/fsl-ci-rules-entrypoint" ]
+CMD [ "/bin/bash" ]
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