Install header-only Boost in the image

Refactor the Dockerfile so we have one file for both arches.

Dockerfile

@@ -0,0 +1,18 @@
+# Note, TARGET_ARCH must be defined as a build-time arg, it is deliberately different
+# from TARGETARCH which is defined by docker. The reason is because TARGETARCH=amd64
+# but we need TARGET_ARCH=x86_64
+ARG TARGET_ARCH
+FROM quay.io/pypa/manylinux2014_${TARGET_ARCH}:latest
+
+ARG BOOST_VERSION=1.85.0
+ARG HDF5_VERSION=1.14.2
+
+ENV HDF5_VERSION=${HDF5_VERSION} \
+    HDF5_DIR=/usr/local \
+    BOOST_DIR=/usr/local \
+    BOOST_VERSION=${BOOST_VERSION}
+
+COPY install_libaec.sh install_hdf5.sh install_boost.sh /tmp/
+RUN bash /tmp/install_libaec.sh
+RUN bash /tmp/install_hdf5.sh
+RUN bash /tmp/install_boost.sh

install_boost.sh

@@ -0,0 +1,14 @@
+set -euo pipefail
+
+BOOST_DOWNLOAD_FILE="boost-cmake.tar.xz"
+curl -fsSL -o $BOOST_DOWNLOAD_FILE https://github.com/boostorg/boost/releases/download/boost-${BOOST_VERSION}/boost-${BOOST_VERSION}-cmake.tar.xz
+tar -xvf $BOOST_DOWNLOAD_FILE
+pushd boost-${BOOST_VERSION}
+
+./boostrap.sh --prefix=${BOOST_DIR}
+# We have to explicitly include cmakedir here so that cmake files are installed
+./b2 variant=release toolset=gcc --with-headers --cmakedir=${BOOST_DIR}/lib/cmake install
+
+popd
+
+rm -rf boost-${BOOST_VERSION} ${BOOST_DOWNLOAD_FILE}