Improve MY APP）Using Ruby_on_rails,BOOTSTRAP so on.

Now I'm makeQ&A APP ,and I have this [login to view URL] Please improve my app using Ruby_on_rails. I can use Ruby_on_rails,GITHUB,HEROKU ,But not so good. 1 Desing Change The design of this APP is so simple,so I want to chage design more beautifully. Please Change My APP ,beautifully (For example,using BOOTSTRAP) Change design like this sample-2【QUORA】[login to view URL] samle-1【ESCORA】:[login to view URL] CHANGE 　3Places 1) TOP screen )[login to view URL] 2)Category screen)[login to view URL] 3)Post Question)[login to view URL] 2 Photo uproad 　There is no Photo uproad,so when someone doing posting information, 　I want you to be able to upload photos as well 　(For example using [gem］careerwave･･) 3 Fixing code Now I can't uproard My Photo,so Please fix this BUG. [login to view URL] 4 Advise I want to Post an advertisement. So Please teachme the code of Whew should I change and Recommended ads 【How to communicate?】 Using below GITHUB:[login to view URL] HEROKU:[login to view URL] you can see code