Allow override of dev server port.

Author: acthp

webpack.config.js

@@ -18,6 +18,8 @@ try {
 	}
 }
 
+var port = process.env.BRCAPORT || 8080;
+
 module.exports = {
 	historyApiFallback: true,
 	entry: "./js/index",
@@ -26,6 +28,9 @@ module.exports = {
 		publicPath: "/",
 		filename: "[name].js"
 	},
+	devServer: {
+		port: port
+	},
 	module: {
 		loaders: [
 			// The next three are required for muts-needle-plot.