RewriteEngine on

# prevent httpd from serving dotfiles (.htaccess, .svn, .git, etc.) - except let's encrypt challenge
RedirectMatch 403 ^/?\.(?!/well-known/acme-challenge/[\w-]{43}$)

# RewriteBase is required in some hosting environments (Amazon EC2, ...)
#RewriteBase /

# if a directory or a file exists, use it directly
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d

# prevent application 404 errors
RewriteCond %{REQUEST_FILENAME} !robots\.txt
RewriteCond %{REQUEST_FILENAME} !favicon\.ico

# otherwise forward it to index.php
RewriteRule . index.php