Trying to access failed build log in Docker Image

Hey folks, quick question. I’m using drone 0.4.2 pulled down from docker hub. I have a couple of jobs failing and the output points towards a debug log - /drone/src/github.xxxxxxxx.gov/ts104/shifter/npm-debug.log. How do I get into this debug log? I’ve tried docker exec -it drone /bin/bash and docker exec -it drone /bin/sh (doesn’t look like any shells are included in the container) and tried attaching to the container without any luck. I’m new to drone and trying to learn it =).

npm ERR! Linux 4.7.1-1.el7.centos.x86_64
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "--loglevel" "http"
npm ERR! node v4.3.2
npm ERR! npm  v2.14.12

npm ERR! Callback called more than once.
npm ERR! 
npm ERR! If you need help, you may report this error at:
npm ERR!     <https://github.com/npm/npm/issues>

npm ERR! Please include the following file with any support request:
npm ERR!     /drone/src/github.xxxxxxxxx.gov/ts104/shifter/npm-debug.log
[info] build failed (exit code 1)

Update: Figured out my issue, wasn’t looking on the slaves for the logs.