Add docker files for building nogil Python

docker/Dockerfile

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+# Copied from https://github.com/docker-library/python/blob/master/3.9/bullseye/Dockerfile
+
+FROM buildpack-deps:bullseye
+
+ARG commit
+
+# ensure local python is preferred over distribution python
+ENV PATH /usr/local/bin:$PATH
+
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
+# extra dependencies (over what buildpack-deps already includes)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+		libbluetooth-dev \
+		tk-dev \
+		uuid-dev \
+	&& rm -rf /var/lib/apt/lists/*
+
+RUN set -ex \
+	\
+	&& wget -O python.tar.gz "https://github.com/colesbury/nogil/tarball/$commit" \
+	&& mkdir -p /usr/src/python \
+	&& tar -xC /usr/src/python --strip-components=1 -f python.tar.gz \
+	&& rm python.tar.gz \
+	\
+	&& cd /usr/src/python \
+	&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
+	&& ./configure \
+		--build="$gnuArch" \
+		--enable-loadable-sqlite-extensions \
+		--enable-optimizations \
+		--enable-option-checking=fatal \
+		--enable-shared \
+		--with-system-expat \
+		--with-system-ffi \
+	&& make -j "$(nproc)" \
+	&& make install \
+	&& rm -rf /usr/src/python \
+	\
+	&& find /usr/local -depth \
+		\( \
+			\( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+			-o \( -type f -a \( -name '*.pyc' -o -name '*.pyo' -o -name '*.a' \) \) \
+		\) -exec rm -rf '{}' + \
+	\
+	&& ldconfig \
+	\
+	&& python3 --version
+
+# make some useful symlinks that are expected to exist
+RUN cd /usr/local/bin \
+	&& ln -s idle3 idle \
+	&& ln -s pydoc3 pydoc \
+	&& ln -s python3 python \
+	&& ln -s python3-config python-config \
+	&& ln -s pip3 pip
+
+CMD ["python3"]

docker/cuda/Dockerfile

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+# Copied from
+#  https://github.com/docker-library/python/blob/master/3.9/bullseye/Dockerfile
+# and modified.
+
+FROM nvidia/cuda:11.0-devel-ubuntu20.04
+
+ARG commit
+
+# ensure local python is preferred over distribution python
+ENV PATH /usr/local/bin:$PATH
+
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
+# Don't ask questions during build.
+ENV DEBIAN_FRONTEND=noninteractive
+
+# Dependencies.
+RUN apt-get update && apt-get install -y --no-install-recommends \
+	build-essential \
+	bzip2 \
+	libbluetooth-dev \
+	libbz2-dev \
+	libcurl4-openssl-dev \
+	libdb-dev \
+	libffi-dev \
+	libgdbm-dev \
+	liblzma-dev \
+	libncurses5-dev \
+	libncursesw5-dev \
+	libpng-dev \
+	libreadline-dev \
+	libsqlite3-dev \
+	libssl-dev \
+	tk-dev \
+	uuid-dev \
+	wget \
+	&& rm -rf /var/lib/apt/lists/*
+
+RUN set -ex \
+	\
+	&& wget --no-verbose -O python.tar.gz "https://github.com/colesbury/nogil/tarball/$commit" \
+	&& mkdir -p /usr/src/python \
+	&& tar -xC /usr/src/python --strip-components=1 -f python.tar.gz \
+	&& rm python.tar.gz \
+	\
+	&& cd /usr/src/python \
+	&& gnuArch="$(dpkg-architecture --query DEB_BUILD_GNU_TYPE)" \
+	&& ./configure \
+		--build="$gnuArch" \
+		--enable-loadable-sqlite-extensions \
+		--enable-optimizations \
+		--enable-option-checking=fatal \
+		--enable-shared \
+		--with-system-expat \
+		--with-system-ffi \
+	&& make -j "$(nproc)" \
+	&& make install \
+	&& rm -rf /usr/src/python \
+	\
+	&& find /usr/local -depth \
+		\( \
+			\( -type d -a \( -name test -o -name tests -o -name idle_test \) \) \
+			-o \( -type f -a \( -name '*.pyc' -o -name '*.pyo' -o -name '*.a' \) \) \
+		\) -exec rm -rf '{}' + \
+	\
+	&& ldconfig \
+	\
+	&& python3 --version
+
+# make some useful symlinks that are expected to exist
+RUN cd /usr/local/bin \
+	&& ln -s idle3 idle \
+	&& ln -s pydoc3 pydoc \
+	&& ln -s python3 python \
+	&& ln -s python3-config python-config \
+	&& ln -s pip3 pip
+
+CMD ["python3"]
+
+
+# Docker commands:
+#   docker rm nogil -v
+#   docker build -t nogil .
+#   docker run --gpus all --rm --name nogil nogil
+# or
+#   docker run --gpus all -it --entrypoint /bin/bash nogil