Publish Alpine musl distroless Postfix as the sole latest image

env.sample

@@ -38,7 +38,7 @@ DEBUG=no
 # ============================================
 
 # --------------------------------------------
-# Option 1: Maileroo (Current Configuration)
+# Option 1: Maileroo
 # --------------------------------------------
 SMTP_SERVER='smtp.maileroo.com'
 SMTP_PORT=587
@@ -95,7 +95,7 @@ SMTP_PASSWORD=your_maileroo_password_here
 # Notes
 # ============================================
 #
-# 1. The container automatically detects /16 subnet for relay
+# 1. The container automatically detects the local IPv4 subnet for relay
 #    Additional networks can be added via SMTP_NETWORKS
 #
 # 2. All logs are sent to stderr and visible via:
@@ -104,7 +104,7 @@ SMTP_PASSWORD=your_maileroo_password_here
 # 3. TLS is automatically enabled for known providers
 #    (Maileroo, Mailtrap, SendGrid)
 #
-# 4. Health check monitors Postfix status every 30 seconds
+# 4. Native health check verifies the SMTP greeting every 30 seconds
 #
 # 5. For SendGrid, username must be "apikey" (literal string)
 #