Failed to mount: mount path must begin with "/"

Bug Report

Describe the bug

yarn docz:dev on a fresh create-react-app fails with the error:

AssertionError [ERR_ASSERTION]: mount path must begin with “/”

To Reproduce

Reproduction Repository

(Optional: 1. Generate a fresh create-react-app and install Docz as usual) 2. Run yarn docz:dev 3. See error

create-react-app docz-bug
cd docz-bug
yarn add docz --dev 
# add scripts to package.json
yarn docz:dev

AssertionError [ERR_ASSERTION]: mount path must begin with "/"
    at mount (C:\Users\Kalyn Robinson\Documents\Development\aap\spill\node_modules\koa-mount\index.js:33:10)
    at Object.add (C:\Users\Kalyn Robinson\Documents\Development\aap\spill\node_modules\docz-core\dist\index.js:1:104906)
    at promise.then (C:\Users\Kalyn Robinson\Documents\Development\aap\spill\node_modules\docz-core\node_modules\webpack-serve\lib\app.js:45:17)
    at process._tickCallback (internal/process/next_tick.js:68:7)
error Command failed with exit code 1.

Expected behavior

Docz should successfully compile.

Environment

• OS: Windows 10
• Node/npm version:
  • Yarn 1.12.3
  • Node v10.3.0

Additional context/Screenshots Docz provides koa-mount with the path \public; koa-mount only accepts paths that begin with /. Hardcoding the path as /public in koa-mount/index.js circumvents this issue (please forgive me for this sin).

[EduhCosta]

When the next release comes out, I’m in great need of this correction?

[patricksevat]

Hi, I’ve run into this issue as well.

I’ve narrowed it down to https://github.com/pedronauck/docz/blob/master/packages/docz-core/src/webpack/devserver.ts#L46 . The fix is simple: just use path.posix.join to force a forward slash for the route as path.join will result in a backslash seperator on windows.

I can submit a PR if you’d like?