updating README

README.md

 
 ### environment files
 
-To deploy this environment, first copy env.template to a new file, env.dev. Fill in the appropriate environment variables.
+To deploy this environment, first copy .env.template to a new file, .env. Fill in the appropriate environment variables.
 
 ### Docker Compose
 
+Copy the appropriate Docker Compose file to docker-compose.yml based on whether you want to run Nginx from the same Docker Compose file or not.
+
 In the command line, navigate to the directory where this repository is stored on your local machine and run:
 
 `docker compose up -d --build`