arm64/qemu build

• Build arm64v8 version of eic-container to be used on ARM systems (such as the arm-based MacOS systems, or raspberry pi systems).

containers/jug/dev.Dockerfile

@@ -23,6 +23,7 @@ RUN --mount=type=cache,target=/var/cache/apt                            \
 
 ## Setup spack
 ## parts:
+ARG ARCH="x86_64"
 ENV SPACK_ROOT=/opt/spack
 ARG SPACK_ORGREPO="spack/spack"
 ARG SPACK_VERSION="develop"
@@ -40,7 +41,7 @@ RUN git clone https://github.com/${SPACK_ORGREPO}.git ${SPACK_ROOT}     \
  && ln -s $SPACK_ROOT/share/spack/docker/entrypoint.bash                \
           /usr/sbin/spack-env                                           \
  && export PATH=${PATH}:${SPACK_ROOT}/bin                               \
- && spack config --scope site add "packages:all:target:[x86_64_v3]"     \
+ && spack config --scope site add "packages:all:target:[${ARCH}]"       \
  && spack config blame packages                                         \
  && spack config --scope site add "config:suppress_gpg_warnings:true"   \
  && spack config --scope site add "config:build_jobs:64"                \
@@ -92,6 +93,7 @@ RUN git clone https://github.com/${EICSPACK_ORGREPO}.git ${EICSPACK_ROOT}     \
 ## Setup our custom environment
 COPY spack.yaml /opt/spack-environment/
 RUN rm -r /usr/local                                                    \
+ && source $SPACK_ROOT/share/spack/setup-env.sh                         \
  && spack env activate /opt/spack-environment/                          \
  && spack concretize