Hint to example01 added

README.md

@@ -21,3 +21,12 @@ To compile and install the lib:
 To use the library, you need:
 * libcurlpp
 * libjsoncpp
+
+You can use example01.cc to start your own bot or CGI script.
+
+Do not forget to send your web hook URL to Telegram's API network,
+otherwise, you cannot send commands to your bot.
+
+In case you build a CGI script, do not forget to add a valid
+certificate to your web server, because your bot is only called via
+HTTPS!