Having created a php server tinywebdb, I was tempted to try it out with google apps script and store the data on a spreadsheet!
https://sites.google.com/view/metricrat-ai2/guides/tinywebdb-encrypted-on-a-spreadsheet
I like the documentation and the atomicity improvement.
Thanks for the post!
I had to look it up 
It is easy to lock the data just put the following at the beginning and end of the main function (this for google apps script):
//lock sheet to prevent concurrent changes
var lock = LockService..GetPublicLock();
lock.waitLock(5000);
<...script code here....>
//release spreadsheet for editing
lock.releaseLock();
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