Update README.md

Author: jlukic

README.md

@@ -23,7 +23,7 @@ Assuming two sibling folders:
 * npm install in both directories
 * Go through Semantic UI installer steps (auto)
 * In `./ui` folder `gulp build-docs` (builds files to ./docs)
-* In `./docs` folder `docpad run`
+* In `./docs` folder `docpad install` then `docpad run`
 * Go to http://localhost:9778/ docs should be there
 * Optionally run `gulp serve-docs` in ./ui to serve any changes from ./ui/src to ./docs