Google Cloud Run Monthly Costs for a max of 150K chart requests per month

What would be the monthly cost of deploying this on Google Cloud Run using the Deploy click link on GitHub assuming a super max of 150,000 chart requests per month ?

Currently the service is on a Cloudways server which went down due to some reason :

Service Unavailable
The server is temporarily unable to service your request due to maintenance downtime or capacity problems. Please try again later.

Apache/2.4.62 (Debian) Server at xxx.cloudwaysapps.com Port 80

Assuming 1000 hits per day. Max 5,000.
I don’t want to spend more than what I’m spending on Cloudways / DigitalOcean.