Best practice is to use single quote all the time :

   ORG1_PASSWORD='$orgOne12345'
   ORG2_PASSWORD='$orgTwo180000'
   ORG3_PASSWORD='ORG_Admin123'

With no quotes or double quotes the variables will be interpreted in most cases (when interpreted using bash).

Escaping each characters is too verbose and you have to think about it and do it properly each time you change the password.

References :

• https://dotenvx.com/docs/env-file#values
• How do I pass environment variables to Docker containers?
• https://github.com/bkeepers/dotenv/issues/214#issuecomment-144181101