Dear Fedi friends,
Oh happy day!
My woes have gone away since I realized I can use Docker exclusively via CLI (and not GUI - I thought that was the default). When I couldn’t connect Docker Desktop to my VPS yesterday I was feeling so down. But yay Docker CLI here I come.
Special thanks to everyone who offered advice yesterday, ESPECIALLY @antoine_ali 
I have a feeling you’ll get a laugh out of my next blog post detailing my attempts - because my perception of how Docker operates was all warped.
I must have exposed to the outside my current Docker instance with yesterday’s inane tweaks to access the GUI, so I will uninstall and re-install Docker first thing today… and up the challenge by attempting to do a fresh Ghost installation on it.
I truly know nothing! But I know more than yesterday, that’s for sure. 
Thank you for all your advice (and patience!) 
I'm sure you're having a better morning than me because I was greeted with an email from (the VPS provider) that started with "Hello Mr. Rossini" and informed me that the VPS was stopped because they suspected a hack - and it will be permanently deleted. "Now let us know Mr. Rossini if you'd like to purchase a new VPS plan."
30 Euros* for 4 hours of VPS experimentation with Docker! YAY (not!)
(*30 Euros corresponded to a 6-month plan, sigh)
I received ZERO advanced warnings... simply deleted my VPS because of "unusual activity" and proposed I buy a new one.
I had installed on it first thing yesterday morning, but I suppose changing 0.0.0.0 with my VPS's IP4 address in one of the Docker settings... to connect it to Docker GUI did it for me.
You live, you learn.
I will stay away from OVH Cloud.
(Yes I had tried creating an account with Hetzer and NetCup before but they had a convoluted signup process and wanted too much personal info/docs, so I had given up and turned to OVH. My bad).
What will I do now?
Find a new VPS provider.
Feeling salty about the 30 Euros I spent for 6 months with OVH but honestly I feel like I dodged a bullet. I had nothing installed on the VPS, except for Fail2Ban and basic Docker. Imagine how catastrophic it would have been if they had deleted my VPS without warning if I had important stuff on it! Shivering at the thought.
Onwards and upwards, more humble than ever, with infinite respect for sysadmins
