Change the download of the container to singularity library

[vinferrer]

Closes # .

Changes proposed in this pull request:

• Adds singularity recipe for the slim container
• singularity now downloads the container from singularity repository
• errors from jobs now are separated in a file by job

[codecov]

Codecov Report

Merging #56 (0b4d6c2) into main (ffdd4b7) will decrease coverage by 0.10%.
The diff coverage is 0.00%.

❗ Current head 0b4d6c2 differs from pull request most recent head 228ea20. Consider uploading reports for the commit 228ea20 to get more accurate results

@@            Coverage Diff             @@
##             main      #56      +/-   ##
==========================================
- Coverage   89.23%   89.12%   -0.11%     
==========================================
  Files          15       15              
  Lines         836      837       +1     
==========================================
  Hits          746      746              
- Misses         90       91       +1     

Impacted Files	Coverage Δ
connPFM/deconvolution/roiPFM.py	96.00% <ø> (ø)
connPFM/deconvolution/stability_lars_caller.py	43.85% <0.00%> (-0.79%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update ffdd4b7...228ea20. Read the comment docs.

[eurunuela]

I have a minor comment but won't hold the PR from being merged because of that.

[eurunuela]

LGTM!