using handlebars templating engine, refactored server code and storage code

package.json

@@ -6,9 +6,12 @@
   "dependencies": {
     "aws-sdk": "^2.62.0",
     "body-parser": "^1.17.2",
+    "bytes": "^2.5.0",
+    "color-convert": "^1.9.0",
     "connect-busboy": "0.0.2",
     "convict": "^3.0.0",
     "express": "^4.15.3",
+    "express-handlebars": "^3.0.0",
     "fs-extra": "^3.0.1",
     "node-fetch": "^1.7.1",
     "path": "^0.12.7",
@@ -16,6 +19,7 @@
   },
   "devDependencies": {
     "browserify": "^14.4.0",
+    "buffer-shims": "^1.0.0",
     "cross-env": "^5.0.0",
     "prettier": "^1.3.1",
     "watchify": "^3.9.0"