Unable to build docker image

[asmith26]

I've cloned the repository and I'm trying to build the given Dockerfile locally (on Windows via Docker Toolbox). However unfortunately I'm getting the following error in my docker build log:

Step 10 : RUN cd /opt/dashboardsly && npm run build
 ---> Running in 508c2876e643

> dashboardsly@0.0.2 build /opt/dashboardsly
> dashboardsly/build/build

sh: 1: dashboardsly/build/build: not found

npm ERR! Linux 4.4.17-boot2docker
npm ERR! argv "/usr/bin/nodejs" "/usr/bin/npm" "run" "build"
npm ERR! node v4.6.1
npm ERR! npm  v2.15.9
npm ERR! file sh
npm ERR! code ELIFECYCLE
npm ERR! errno ENOENT
npm ERR! syscall spawn
npm ERR! dashboardsly@0.0.2 build: `dashboardsly/build/build`
npm ERR! spawn ENOENT
npm ERR!
npm ERR! Failed at the dashboardsly@0.0.2 build script 'dashboardsly/build/build'.
npm ERR! This is most likely a problem with the dashboardsly package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR!     dashboardsly/build/build
npm ERR! You can get information on how to open an issue for this project with:
npm ERR!     npm bugs dashboardsly
npm ERR! Or if that isn't available, you can get their info via:
npm ERR!
npm ERR!     npm owner ls dashboardsly
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR!     /opt/dashboardsly/npm-debug.log
The command '/bin/sh -c cd /opt/dashboardsly && npm run build' returned a non-zero code: 1

I'm not too familiar with npm, but it looks like it can't find the correct files? Unfortunately I can't find /opt/dashboardsly/npm-debug.log that it wants me to include (neither on my local Windows system, nor can I enter the container to see if it exists within there).

Looking further up the docker build log, I did find a few npm warnings:

Step 6 : RUN cd /opt/dashboardsly && npm install
 ---> Running in 2947c1e3c182
npm WARN package.json dashboardsly@0.0.2 No repository field.
npm WARN package.json dashboardsly@0.0.2 No README data
npm WARN optional dep failed, continuing fsevents@1.0.14
npm WARN deprecated minimatch@2.0.10: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue

Your help is greatly appreciated!