Inside the Bootstrap-Portfolio repo, create index.html, portfolio.html and contact.html. Using Bootstrap, recreated my portfolio site with the following items:
A navbar
A responsive layout (remember the grid, rows and columns are your friends)
eg. On xs and sm screens, content should take up the entire screen. On md and larger screens, you should have some margins on the left and right side of the screen. Check out various sites on your mobile device versus your computer to see this in action!
Responsive images
Using Bootstrap, make a sticky footer and use sub-rows and sub-columns on your portfolio site. The Bootstrap solution minimizes use of media queries.