Add public url to prod webpack config (#615)

* add public url to prod webpack config

* modify travis/webpack config to add public url

* add slash

.travis.yml

@@ -36,7 +36,12 @@ after_success:
     else
       export NODE_ENV=development;
     fi
-  - if [[ -n "$TRAVIS_TAG" ]]; then export REACT_APP_ENV='production'; fi
+  - |
+
+    if [[ -n "$TRAVIS_TAG" ]]; then
+      export PRODUCTION_DEPLOYMENT=true;
+      export REACT_APP_ENV='production';
+    fi
   - yarn build
   # Pull Request - Deploy it to a review environment
   # Travis doesn't do deploy step with pull requests builds

config/webpack.config.prod.js

@@ -54,7 +54,7 @@ function ensureSlash(path, needsSlash) {
 // like /todos/42/static/js/bundle.7289d.js. We have to know the root.
 const homepagePath = require(paths.appPackageJson).homepage
 //  var homepagePathname = homepagePath ? url.parse(homepagePath).pathname : '/';
-const homepagePathname = "/"
+const homepagePathname = process.env.PRODUCTION_DEPLOYMENT ? "/app/" : "/"
 // Webpack uses `publicPath` to determine where the app is being served from.
 // It requires a trailing slash, or the file assets will get an incorrect path.
 const publicPath = ensureSlash(homepagePathname, true)