shrinking the heroku slug size

.slugignore

@@ -0,0 +1 @@
+assets/img/

Gulpfile.js

@@ -5,6 +5,7 @@ var cache       = require('gulp-cache');
 var cachebust   = require('gulp-cache-bust');
 var concat      = require('gulp-concat');
 var cp          = require('child_process');
+var del         = require('del');
 var es          = require('event-stream');
 var footer      = require('gulp-footer');
 var header      = require('gulp-header');
@@ -18,6 +19,7 @@ var sass        = require('gulp-sass');
 var server      = require('gulp-develop-server');
 var shell       = require('gulp-shell');
 var uglify      = require('gulp-uglify');
+var del          = require('del');
 
 var bustingCache = false;
 
@@ -412,6 +414,10 @@ gulp.task('build.clean', ['build-prep'], function(done) {
   })
 });
 
+gulp.task('slug.prep', function () {
+  return del(['assets', 'content']);
+});
+
 gulp.task('build-prep', ['ionicons', 'cli-docs', 'styles:v1', 'styles:v2', 'images', 'js', 'docs.index'], bustCache);
 
 gulp.task('default', ['build']);

package.json

@@ -4,7 +4,7 @@
   "description": "Ionic Framework main site - IonicFramework.com",
   "main": "Gulpfile.js",
   "scripts": {
-    "heroku-postbuild": "gulp build.clean"
+    "heroku-postbuild": "gulp build.clean && gulp slug.prep"
   },
   "engines": {
     "node": "6.9.2"
@@ -27,6 +27,7 @@
     "browser-sync": "^1.3.7",
     "compression": "^1.4.6",
     "cookie-parser": "^1.4.3",
+    "del": "^2.2.2",
     "event-stream": "^3.3.1",
     "express": "^4.12.3",
     "express-ab": "^0.7.0",