A base .htaccess with HTTPS redirect behind an AWS Load Balancer #apache

.htaccess

<IfModule mod_rewrite.c>
    <IfModule mod_negotiation.c>
        Options -MultiViews
    </IfModule>

    RewriteEngine On

    # Force HTTPS - Proto needed for AWS ELB
    RewriteCond %{HTTP:X-Forwarded-Proto} !https
    RewriteCond %{HTTP_USER_AGENT} !^ELB-HealthChecker
    RewriteRule ^.*$ https://%{HTTP:Host}%{REQUEST_URI} [L,R=permanent]

    # Redirect Trailing Slashes If Not A Folder...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteRule ^(.*)/$ /$1 [L,R=301]

    # Handle Front Controller...
    RewriteCond %{REQUEST_FILENAME} !-d
    RewriteCond %{REQUEST_FILENAME} !-f
    RewriteRule ^(.*)$ index.php/$1 [L]

    # Handle Authorization Header
    RewriteCond %{HTTP:Authorization} .
    RewriteRule .* - [E=HTTP_AUTHORIZATION:%{HTTP:Authorization}]

</IfModule>

## EXPIRES CACHING ##
<IfModule mod_expires.c>
  ExpiresActive On
  ExpiresByType image/jpg "access 1 year"
  ExpiresByType image/jpeg "access 1 year"
  ExpiresByType image/gif "access 1 year"
  ExpiresByType image/png "access 1 year"
  ExpiresByType text/css "access 1 week"
  ExpiresByType text/html "access 1 week"
  ExpiresByType application/pdf "access 1 month"
  ExpiresByType text/x-javascript "access 1 week"
  ExpiresByType application/x-shockwave-flash "access 1 month"
  ExpiresByType image/x-icon "access 1 year"
  ExpiresDefault "access 1 month"
</IfModule>

## EXPIRES CACHING ##
<IfModule mod_deflate.c>
  # Insert filter
  SetOutputFilter DEFLATE
  # Don't compress images
  SetEnvIfNoCase Request_URI \.(?:gif|jpe?g|png|html)$ no-gzip dont-vary
  # Make sure proxies don't deliver the wrong content
  Header append Vary User-Agent env=!dont-vary
</IfModule>