Merge branch 'fix-issue-1472' into 'develop'

Update Webpack configuration to fix builds on Windows.

Closes #1472

See merge request soapbox-pub/soapbox!2605

webpack/shared.ts

@@ -58,7 +58,7 @@ const configuration: Configuration = {
     chunkFilename: 'packs/js/[name].chunk.js',
     hotUpdateChunkFilename: 'packs/js/[id].hot-update.js',
     path: output.path,
-    publicPath: join(FE_SUBDIRECTORY, '/'),
+    publicPath: process.env.FE_SUBDIRECTORY || '/',
   },
 
   optimization: {