Add variables for handling smtp access

.env.sample

@@ -18,6 +18,7 @@ LETS_ENCRYPT_ENV=production
 GITLAB_ROOT_EMAIL="gitlab_admin@example.com"
 SECRET_INITIAL_ROOT_PASSWORD_VERSION=v1
 SECRET_RUNNER_TOKEN_VERSION=v1
+SECRET_SMTP_PASSWORD=v1
 
 GITLAB_CONF_VERSION=v1
 ENTRYPOINT_VERSION=v1
@@ -28,4 +29,13 @@ SSO=false
 # ORG_NAME="My Organization"
 # SSO_PROVIDER_URL="https://authentik.mydomain.com/application/o/gitlab/"
 # SSO_PROVIDER_ID="your authentik Client ID"
-# SECRET_SSO_PROVIDER_SECRET_VERSION=v1
+# SECRET_SSO_PROVIDER_SECRET_VERSION=v1
+
+## Enable SMTP sending
+#SMTP_ENABLE_FLAG=true
+#SMTP_HOST=smtp.server.com
+#SMTP_PORT=465
+#SMTP_USER=your@user.com
+#SMTP_HOST_FROM_ADDRESS=your@user.com
+#SMTP_FROM_NAME="Gitlab"
+#SMTP_STARTTLS_FLAG=true