adpated to appeears api change of accepted date format, now: mm-dd-yyyy

adapted to appears api writing scale factor to mod11a2 tifftag now.

quitting if no new dates available, no error and date checking on all folders

fixed doy matching between lst, ndvi and ref data. Added more logging + fixed mount points.

upd from v6 .0  to v6.1 starting on doy2022313 + added check for env var appears_login

upd from v6 .0  to v6.1 starting on doy2022313

removed appears_login.pwd from dockerfile https://gitlab.inf.unibz.it/ado/vhi_operational/-/commit/92b41e2dd4c2d5ccf0aafd31bb731b427a039979

fixed file.exist checking errors, better checking in download if all files are available in both collections

Fixing error logging to get errors from subscripts in main script run_pipeline. #7
Fixing more error logging issues. #6, #14
Using appears_login from the CI/CD Variables now. #13 
Documented what happens upon commit, push and tag in the pipeline (tag updates the docker that is used in pipeline) #19

Starting pipeline with chron job, 
DATE_START, DATE_END disabled -> 01_appears_download.R determines it by itself using eurac archive and modis archive,

added login appears to cicd as variable

testing cicd for building docker