Cloud Functions Config Env.

Setting google cloud functions config env.

Refer to doc here <a href="https://firebase.google.com/docs/functions/config-env">Config Env. Setup</a>

# Set environment configuration for your project
```
firebase functions:config:set someservice.key="THE API KEY" someservice.id="THE CLIENT ID"
```

# Retrieve current environment configuration
```
firebase functions:config:get
```

# Access environment configuration in a function
```
functions.config().someservice.id
```

# Removes the specified keys from the config
```
firebase functions:config:unset key1 key2
```

# Clones another project's environment into the currently active project
```
firebase functions:config:clone --from <fromProject>
```