Docker image reading db properties

I have a java program that reads PostgreSQL database using db.properties file which I kept it under C:optxyzprojectnamedb.propperties.

Created the Docker image and was able to run on my local Docker container with -v option.

Ex: docker run -itd -v C:/opt/xyz/projectname:/opt/xyz/projectname projectName:tag

I have moved the image to the Google cloud and want to run the image on Cloud run.

Q: How can setup the db.properties file like I did it on my windows at C:optxyzprojectnamedb.propperties ?

Source: StackOverflow