injected js and css into octoprint source for manual styling
install "Navbar Temperature Plugin (0.xx)"
edit file : /home/octoprint/OctoPrint/src/octoprint/templates/index.jinja2
add following before </header>
<script type="text/javascript" src="http://192.168.120.244:88/jquery.js"></script>
<link href="http://192.168.120.244:88/custom.css" rel="stylesheet">
<script src="http://192.168.120.244:88/custom.js" type="text/javascript"></script>
next: put custom.js, custom.css and jquery.js on any webserver and adapt url in previous step
next: compile and serve