

I know of a few VPS that are ‘free’, and I use that word quite loosely. Long time back I explored a few, and I can tell you that they are not worth the time of day. Very cheap VPS can be had. I had one that ran me $25 USD per year. It wasn’t the most thread rippin’ VPS you could have, but it certainly was cheap, and at one time I had about 25 different containers running on it with out much trouble. A good place to look for cheap VPS is at lowendbox.com.
Oracle offers a free tier, but you really have to watch your consumption of resources, and I believe they require a credit card to open an account. There are horror stories of people who went over the limit and ended up with a good size bill
I realize $25 USD is not free and does not fit within your request, and I empathize. As far as using your own computer with something like Docker, and shutting it down each evening…I shut my server down every evening via a cron job. I am the only user, and I just couldn’t justify letting it run while I slept. So I guess you’d say it’s an intermittent service.

That’s cool. I was thinking one of the free tiers like Amazon, Google required a CC to open one. Side question: What do you run on Oracle, and how fastidious do you have to be about controlling resource consumption? I’ve read about people on one of the free tiers getting socked a big bill, in fact it’s a meme now.
spoiler