1. PHP REQUIREMENT LINK : https://lycheeorg.github.io/docs/installation.html#server-requirements
2. Installer is at http://{{URL}}/public
3. Upgrade is disabled as user name and password are reset after upgrade due to major structural changes from 3.1 to 3.2. Mentioned here:
https://github.com/LycheeOrg/Lychee/issues/278 Provide upgrade in next release as upgrade is possible from 3.2.x to 3.2.x
4. Comment security policy header in .htaccess in our zip i.e Header set Content-Security-Policy "default-src 'self'; style-src 'self' 'unsafe-inline'; script-src 'self'; connect-src 'self' https://lycheeorg.github.io; form-action 'none'; base-uri 'none'; frame-ancestors 'none'; upgrade-insecure-requests; block-all-mixed-content;" . This is needed to install the script on non https servers.(Needed while manual installation as well). Mentioned here :
https://lycheeorg.github.io/docs/
5. Upgrade method https://lycheeorg.github.io/docs/update.html#update-manually
6. We have enabled upgrade from 4.0.x versions.
7. Upgrade from 4.5.3 to 4.6.0 was checked but kept disabled due to 500 HttpException Undefined variable $locale (View: /{{PATH}}/resources/views/gallery.blade.php). Add upgrade once this is resolved.
8. Important note : Keep 'csp' => ['enable' => false in config/secure-headers.php in our zip package(default is true). We do this because logs are not visible in admin panel if csp is enabled.
https://github.com/LycheeOrg/Lychee/issues/1884
(Checked and not required anymore. No error is thrown even if the default is true)