Fields with spaces in dotenv

Dotenv files commonly contain string literals with spaces due to bash field splitting. The typical format of an env file to prevent bash field splitting is to wrap the string with spaces like:

EAUTH_BANNER="Some Long String"
EAUTH_MESSAGE_PREFIX="Authenticate with your MetaMask wallet" 

In contract.js the above format causes issues when reading with process.env as the result is "Some long string" and not Some long string. I propose to add some handling logic in contract.js to handle this common case for better interoperability with bash scripts.

[rht]

EAUTH_MESSAGE_PREFIX="Authenticate with your MetaMask wallet" is for Docker Compose v2.
EAUTH_MESSAGE_PREFIX=Authenticate with your MetaMask wallet is for Docker Compose v1.