Mailer class.
__construct() method is set to private. Developers have to set this
method to public before it can be successfully used.
MD5 Bootstrap, Bootstrap icons and Css animate libraries. These libraries can be
found in their designated folders within the res/main/css directory.
Other libraries may be added locally into the res/css directory. However, ensure to use custom folders to separate
the external libraries. The local path or cdn links of the libraries can also be
included globally within the res/res.php file.
Static file libraries such as bootstrap and javascript files can be found at the res/main/css/
and res/main/js/ directories respectively. The global static resources folder is the res/main directory.
If any of the default libraries needs to be upgraded, that library should be
replaced with newly downloaded files and the correct path must match the path set in the core/res.php file. If new
path name is different, the old path should be updated accordingly. However, as an alternative to using local library file path,
cdn link of such libraries may be used instead which can be added or updated in the
core/res.php file. Custom or new urls should be added from the res/res.php which is reserved for custom static urls.