ci: debug path issue for rmarkdown rendering

Refs #23
1 job for master in 1 minute and 21 seconds (queued for 3 seconds)
Status Name Job ID Coverage
failed deploy #168128


Name Stage Failure
deploy Test
> rmarkdown::render(irmara:::app_sys("app/www/documentation/documentation.Rmd"))
Error in abs_path(input) : The file '' does not exist.
Calls: <Anonymous> -> setwd -> dirname -> abs_path
In addition: There were 16 warnings (use warnings() to see them)
Execution halted
The command '/bin/sh -c R -e 'rmarkdown::render(irmara:::app_sys("app/www/documentation/documentation.Rmd"))'' returned a non-zero code: 1
Connection to closed.
Cleaning up file based variables
ERROR: Job failed: exit code 1