Change the nginx config to use a shared folder for resources

[jbriones1]

Due to the domain splitting work being done #17, there will be a lot of duplicated assets since none of the domains are set to access anything outside of their root folder. To remedy this, we should add a shared resource folder to the /var/www/html folder that all of the sites can access.

This will require:

• Changing the Frontend repos build process to include creating a shared or static folder which will contain all the shared assets

/var/www/html
├── shared // new folder that contains shared assets
│   └── js
│   └── css
│   └── components // common web components for static sites
│   └── images // all images
├── ng
│   └── // The Angular app stuff, I'll figure this part out later
├── <subdomain>

• Updating nginx.conf to have every site have access to this static folder, looking like this:

# nginx.conf
server {
    server_name <subdomain>.sfucsss.org;
    root /var/www/html/<subdomain>;

    location / {
        # subdomain stuff
    }

    location /shared/ {
        alias /var/www/html/shared/;
       ...
    }
}

• Update the links in the static sites to access this shared resource

<!-- *.html -->
<link rel="stylesheet" href="/shared/css/...">
<script src="/shared/js/..."></script>
<img src="/shared/images/..." />

 /* *.css */
div {
    background-image: url('/shared/<path to file>');
}