I migrated the website not long ago to a more expensive faster and “more reliable” Web hosting company called Bluehost. Unfortunately Bluehost suffered yesterday from an issue on the data center which caused an outage for this website as well. The website has been down for about 14 hours and many people may have have wondered what the heck was going on. I found out by a news post that it was the data center which had a problem. I sent in a complained to them so I hope I get some compensation for this matter (a few months free hosting or something like that).
So, I am sorry for the inconvenience and hope the site will be stay stable from now on.