projectfolder/
   wsgi/
     openshift/
         templates/
            home/
              simple-sidebar.html
     static/
         css/
            bootstrap.css
         fonts/
         js/

<link href= "../../../static/css/bootstrap.css" rel="stylesheet">

<link href= "/wsig/static/css/bootstrap.css" rel="stylesheet">

<link href= "../../../../static/css/bootstrap.css" rel="stylesheet">

<link href= "../static/css/bootstrap.css" rel="stylesheet">

<link href= "/wsig/static/css/bootstrap.css" rel="stylesheet">

/  - denotes the current directory you are in
./ - one step outside the current directory
../ - two steps outside the directory