[ENH] build docker image for ModelArray + ConFixel

[zhao-cy]

[zhao-cy]

• test ConVoxel: --> .h5
• test ModelArray
• test ConVoxel: --> .nii.gz
• add MRtrix's mrconvert .... (ConFixel needs mrconvert....)
• test ConFixel --> h5
• test ConFixel --> .mif
• set up a workflow for automatically updating Docker image: using CircleCI

[zhao-cy]

Current docker image is from rocker/verse, it's not rocker/rstudio (https://hub.docker.com/r/rocker/rstudio), so it won't support rstudio or forward rstudio to a portal.

[zhao-cy]

confirmed: all run by singularity image from chenyingzhao/modelarray_confixel:test0.0.0, from h5 --> ModelArray --> nii.gz:
replicated Kristin's PNC fMRI n-back results, with: the max absolute difference are minimal: For parentEdu: tstat and beta estimation: max abs diff < 5.367881747986303e-07. See PennLINC/ModelArray_tests: pncNback_readme.md

[zhao-cy]

when using circle ci to build docker image, probably want to specify --ncpus -4 to "--ncpus -2"; otherwise there may be error message from circle ci...

[zhao-cy]

ConFixel (fixel-part) depends on MRtrix's mrconvert. To save space, only need to copy the binary file mrconvert and eigen (C++ linear algebra dependencies)?
ref: https://github.com/PennLINC/qsiprep_build/blob/main/Dockerfile
L14: FROM pennbbl/qsiprep-mrtrix3:${TAG_MRTRIX3} as build_mrtrix3
to change to:
FROM mrtrix/mrtrix3:${TAG_MRTRIX3} as build_mrtrix3
L55 (packages to be installed): MRTRIX3_DEPS="bzip2 ca-certificates curl libpng16-16 libblas3 liblapack3"
I probably only need bzip2, and lib*