Added config option for websocket port, and reworked the config parsing a bit.

Added SMTP_FROM config to examples and made it mandatory, it doesn't make much sense to not specify the from address.

.env

@@ -14,6 +14,9 @@
 # WEB_VAULT_FOLDER=web-vault/
 # WEB_VAULT_ENABLED=true
 
+## Controls the WebSocket server port
+# WEBSOCKET_PORT=3012
+
 ## Controls if new users can register
 # SIGNUPS_ALLOWED=true
 
@@ -42,8 +45,10 @@
 # ROCKET_PORT=8000
 # ROCKET_TLS={certs="/path/to/certs.pem",key="/path/to/key.pem"}
 
-## Mail specific settings, if SMTP_HOST is specified, SMTP_USERNAME and SMTP_PASSWORD are mandatory
+## Mail specific settings, set SMTP_HOST and SMTP_FROM to enable the mail service.
+## Note: if SMTP_USERNAME is specified, SMTP_PASSWORD is mandatory
 # SMTP_HOST=smtp.domain.tld
+# SMTP_FROM=bitwarden-rs@domain.tld
 # SMTP_PORT=587
 # SMTP_SSL=true
 # SMTP_USERNAME=username