I've checked previous messages about this subject and some official info and more official info and I've tried to make changes on my own, but without luck :(

I'm working with a Nginx web server and I have moved a site from an Apache server that had the following .htaccess file:

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Options +FollowSymLinks +ExecCGI

<IfModule mod_rewrite.c>
RewriteEngine On

# uncomment the following line, if you are having trouble
# getting no_script_name to work
RewriteBase /fbstore

# we check if the .html version is here (caching)
RewriteRule ^$ index.html [QSA]
RewriteRule ^([^.]+)$ $1.html [QSA]
RewriteCond %{REQUEST_FILENAME} !-f

# no, so we redirect to our front web controller
RewriteRule ^(.*)$ index.php [QSA,L]
</IfModule>

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Could somebody help me and translate this into my Nginx virtualhost file, on /etc/nginx/sites-available/fbstore.conf?