message: Add BUILD_ENV
diff: @@ -40,9 +40,8 @@ popd > /dev/null
  readonly STATIC_DIR=$OUT_DIR/static
  mkdir -p $STATIC_DIR
  -# Build main.js
  -# TODO(fortuna): Have different production and development builds.
  -webpack --mode=development --config=$ROOT_DIR/src/server_manager/webpack.config.js
  +# Notice that we forward the build environment if defined
  +webpack --config=$ROOT_DIR/src/server_manager/webpack.config.js ${BUILD_ENV:+--mode=${BUILD_ENV}}
  # Browserify node_modules/ (just a couple of key NPMs) and app.
  # TODO(fortuna): Use polymer-webpack-loader instead.
  