> We run our monolith (Spring boot) as a Docker service

Does Cloud Run's free tier 'sleep' containers when they don't get regular traffic? Several years back Heroku nerfed their free tier -- they would proactively place low traffic apps into 'sleep' mode so the next request would have a noticeable several second long delay.

I ask because our SpringBoot monolith takes 30s to startup, and has bursty traffic, so I was of the expectation that Google Cloud would probably 'sleep' low traffic containers like this also. Would be nice if that were not the case.