Env configs

If you need to set up environment variables - just copy .env.example to .env and feel free to set up

By default (without copying) will be work in ENV_CONFIG=default (all settings as in .env.example)

The .env.example looks like

# ENV_CONFIG
# can be:
# default - set up to our real backend (localhost:3000), uses by default
# fakeBack - set up to fake backend
# heroku - set up to our heroku api application
# heroku-qa - set up to our heroku-qa api application
ENV_CONFIG = default

# RELEASE
RELEASE=''

# BLOCK for E2E configuration
E2E_MQTT_HOSTNAME='localhost'
E2E_MQTT_PORT='1883'
E2E_MQTT_USERNAME='USERNAME'
E2E_MQTT_PASSWORD='PASSWORD'