Release v4.0.3

• 9b2d54f improved healthcheck with proper command sequence
• 1c71da7 Upd: Explicitly link timezone to folder
• b56239b Upd: Add docket to dependabot.
• 72988dd Fix #158: Add copytruncate to logrotate.conf.
• 4b45249 Fix #160: Update documentation, add info about smtpd_tls_security_level change
• 553874a Fix ServiceMonitor selector
• b317e68 Fix for #163: Remove NodePort from headless service