Error node: .env: not found when start my node docker app

[Ridermansb]

adapter env requires that I have .env file on my nodejs application?

I have a Node app that I'm deploying to Cloud Run using a Dockerfile.

And on my api I use const environmentVariables = env(c); (from env adapter).

The problem is that when I try to run my Docker container, I receive the following error:

node: .env: not found                       
❌ [start] Service exited unexpectedly
❌ 1 script failed.

This occurs because I have already configured the environment variables in my Docker container. Therefore, I don't need the .env file; I only require it for my local development.

Question:

1. Do I need .env file even deploying to my CloudRun using Docker?
2. If I don't use env adapter and just use process.env it's the same?