docs: Use content of README.md as main page of documentation
diff --git a/doxygen.cfg.in b/doxygen.cfg.in
index 3455c3b..3f006a3 100644
--- a/doxygen.cfg.in
+++ b/doxygen.cfg.in
@@ -819,7 +819,7 @@
 # spaces. See also FILE_PATTERNS and EXTENSION_MAPPING
 # Note: If this tag is empty the current directory is searched.
 
-INPUT                  = include/@PACKAGE@
+INPUT                  = include/@PACKAGE@ README.md
 
 # This tag can be used to specify the character encoding of the source files
 # that doxygen parses. Internally doxygen uses the UTF-8 encoding. Doxygen uses
@@ -968,7 +968,7 @@
 # (index.html). This can be useful if you have a project on for instance GitHub
 # and want to reuse the introduction page also for the doxygen output.
 
-USE_MDFILE_AS_MAINPAGE =
+USE_MDFILE_AS_MAINPAGE = README.md
 
 #---------------------------------------------------------------------------
 # Configuration options related to source browsing