Add build:fast build script

Change-type: patch
Signed-off-by: Vipul Gupta (@vipulgupta2048) <vipul@balena.io>

Author: vipulgupta2048

README.md

@@ -86,9 +86,9 @@ git checkout -b my-docs-patch
 ```
 Now you can make changes in this branch. Since our docs are static pages generated from markdown using metalsmith.io, each time you change some of the `.md` files you will need to run rebuild of the docs to generate the static pages. This is done by running:
 ```
-npm run build
+npm run build:fast
 ```
-However there is a handy watch functionality that will watch for changes in `/pages`, `/shared`, and `/templates` and rebuild each time you save your changes. To use this, open a new tab in your terminal and run:
+This will skip over downloading files from external sources which is a time taking process. However there is a handy watch functionality that will watch for changes in `/pages`, `/shared`, and `/templates` and rebuild each time you save your changes. To use this, open a new tab in your terminal and run:
 ```
 npm run watch-pages
 ```

package.json

@@ -12,6 +12,7 @@
     "test": "npm run test-spelling",
     "test-spelling": "find . -iname \"*.*md\" -not -path \"./CHANGELOG*\" -not -path \"./node_modules/*\" | ./tools/test-spelling.sh",
     "build": "./tools/prepare.sh && ./tools/build.sh && webpack -p",
+    "build:fast": "./tools/build.sh && webpack -p",
     "watch-pages": "watch ./tools/build.sh pages shared templates config",
     "watch-assets": "webpack -w",
     "watch": "npm run watch-pages & npm run watch-assets"