* Add an option to pass env file to deploy command
* Use env variable mapping in fixturenet-optimism stack
* Use default values from checked in env files
* Use env variable mapping in mobymask-v2 stack
* Update instructions
* Add extra hosts in app compose files and update instructions
* Add CERC prefix to env variables in fixturenet-optimism stack
* Add CERC prefix to env variables in mobymask-v2 stack
* Set optimism geth endpoint from env file
* Set L1 account private keys from env
* Only deploy contract and generate invite in mobymask container
* Add readme for running mobymask v2 stack independently
* Modify mobymask container to stop running server and update readmes
* Check deployer account balance before deploying contract
* Fix for checking account balance before deploying
* Update readme description
* Update MobyMask repo tag in readme
