Update readme to note that bot is dockerized

Author: impredicative

README.md

@@ -1,5 +1,5 @@
 # irc-url-title-bot
-**irc-url-title-bot** is a Python 3.8 based IRC URL title posting bot.
+**irc-url-title-bot** is a dockerized Python 3.8 based IRC URL title posting bot.
 It essentially posts the page titles of the URLs that are posted in the configured channels on an IRC server.
 As a disclaimer, note that SSL verification is disabled, and that the posted titles are not guaranteed to be accurate
 due to a number of factors.