Dockerfile doesn't run because no .env in container

[ahshabbir]

While the dockerfile builds correctly, the resulting image won't run because no .env has been imported into the container. There are a couple of ways we can go about handling this issue:

1. Have the builder specify a build-arg with the path to the .env file - this will be imported into the container
2. Make loading the .env file optional, i.e. maybe check if the environment variable is already defined, if not, then load the .env file.

Any thoughts on this?