Update README, make multiscale-run a container _for_ multiscale-run (#8)

Julia is too painful, thus this is not a container containing
multiscale-run any longer, but one that can be used to install
multiscale-run.

Currently disabled, as STEPS can't be built with a modern GCC.

.github/actions/build_container/action.yaml

@@ -21,12 +21,21 @@ inputs:
     description: Extra args to pass to buildah
     required: false
     default: ''
+  DOCKERHUB_USER:
+    description: Username for Dockerhub authentication
+    required: true
+  DOCKERHUB_PASSWORD:
+    description: Password for Dockerhub authentication
+    required: true
   GHCR_USER:
     description: Username for GHCR authentication
     required: true
   GHCR_TOKEN:
     description: Token for GHCR authentication
     required: true
+  GHCR_PATH:
+    description: Path for the GitHub container registry
+    required: true
   SPACK_DEPLOYMENT_KEY_PUB:
     description: Public key for spack deployments
     required: true
@@ -49,6 +58,7 @@ runs:
         echo "${{ inputs.SPACK_DEPLOYMENT_KEY_PUB }}" > ${{ inputs.BUILD_PATH }}/key.pub
         echo "${{ inputs.SPACK_DEPLOYMENT_KEY_PRIVATE }}" > ${{ inputs.BUILD_PATH }}/key
         aws ecr get-login-password --region us-east-1 | buildah login --username AWS --password-stdin ${{ inputs.AWS_ECR_URL }}
+        buildah login --username ${{ inputs.DOCKERHUB_USER }} --password ${{ inputs.DOCKERHUB_PASSWORD }} docker.io
         buildah login --username ${{ inputs.GHCR_USER }} --password ${{ inputs.GHCR_TOKEN }} ghcr.io
         # This is written like that in case $BUILDAH_EXTRA_ARGS has args that require spaces,
         # which is tricky with shell variable expansion.  Similar to Kaniko, see also:

.github/workflows/spacktainer.yaml

@@ -28,6 +28,8 @@ jobs:
             --label ch.epfl.bbpgitlab.ci-commit-branch="$GITHUB_REF_NAME" --build-arg
             SPACK_BRANCH=develop
          # ' --label org.opencontainers.image.created="$CI_JOB_STARTED_AT"'
+          DOCKERHUB_USER: ${{ secrets.DOCKERHUB_USER }}
+          DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
           SPACK_DEPLOYMENT_KEY_PUB: ${{ secrets.SPACK_DEPLOYMENT_KEY_PUB }}
           SPACK_DEPLOYMENT_KEY_PRIVATE: ${{ secrets.SPACK_DEPLOYMENT_KEY_PRIVATE }}
   runtime-container-job:
@@ -56,6 +58,8 @@ jobs:
             --label ch.epfl.bbpgitlab.ci-commit-branch="$GITHUB_REF_NAME" --build-arg
             SPACK_BRANCH=develop
          # ' --label org.opencontainers.image.created="$CI_JOB_STARTED_AT"'
+          DOCKERHUB_USER: ${{ secrets.DOCKERHUB_USER }}
+          DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
           SPACK_DEPLOYMENT_KEY_PUB: ${{ secrets.SPACK_DEPLOYMENT_KEY_PUB }}
           SPACK_DEPLOYMENT_KEY_PRIVATE: ${{ secrets.SPACK_DEPLOYMENT_KEY_PRIVATE }}
   spacktainer-build-job:
@@ -64,10 +68,10 @@ jobs:
         spacktainer:
           - appositionizer
           - brain-indexer
-          - brayns
+          # - brayns
           - connectome-manipulator
           - functionalizer
-          - multiscale-run
+          # - multiscale-run
           - neurodamus-hippocampus
           - neurodamus-neocortex
           - system-benchmarks
@@ -111,5 +115,7 @@ jobs:
             --build-arg MIRROR_AUTH_ARG="\"--s3-access-key-id='${{ secrets.AWS_CACHE_ACCESS_KEY_ID }}
             --s3-access-key-secret=${{ secrets.AWS_CACHE_SECRET_ACCESS_KEY }}'\""
           # ' --label org.opencontainers.image.created="$CI_JOB_STARTED_AT"'
+          DOCKERHUB_USER: ${{ secrets.DOCKERHUB_USER }}
+          DOCKERHUB_PASSWORD: ${{ secrets.DOCKERHUB_PASSWORD }}
           SPACK_DEPLOYMENT_KEY_PUB: ${{ secrets.SPACK_DEPLOYMENT_KEY_PUB }}
           SPACK_DEPLOYMENT_KEY_PRIVATE: ${{ secrets.SPACK_DEPLOYMENT_KEY_PRIVATE }}