added restart policy in comments

docker-compose.yml

     database:
         build: ./postgresql
         container_name: mx-postgresql
+#        restart: unless-stopped
         networks:
             mx.internal.docker:
                 aliases:
     postfixadmin:
         build: ./postfixadmin
         container_name: mx-postfixadmin
+#        restart: unless-stopped
         networks:
             mx.internal.docker:
                 aliases:
     postfix:
         build: ./postfix
         container_name: mx-postfix
+#        restart: unless-stopped
         networks:
             mx.internal.docker:
                 aliases:
     dovecot:
         build: ./dovecot
         container_name: mx-dovecot
+#        restart: unless-stopped
         networks:
             mx.internal.docker:
                 aliases:
     opendkim:
         build: ./opendkim
         container_name: mx-opendkim
+#        restart: unless-stopped
         networks:
             mx.internal.docker:
                 aliases:
     milter-sasl:
         build: ./milter-sasl
         container_name: mx-milter-sasl
+#        restart: unless-stopped
         networks:
             mx.internal.docker:
                 aliases: