added restart policy in comments

docker-compose.yml

     postgresql:
         build: ./postgresql
         container_name: pdns-postgresql
+#        restart: unless-stopped
         networks:
             pdns.internal.docker:
                 aliases:
     poweradmin:
         build: ./poweradmin
         container_name: pdns-poweradmin
+#        restart: unless-stopped
         networks:
             pdns.internal.docker:
                 aliases:
     pdns:
         build: ./pdns
         container_name: pdns-pdns
+#        restart: unless-stopped
         networks:
             pdns.internal.docker:
                 aliases:
     pdns-recursor:
         build: ./pdns-recursor
         container_name: pdns-pdns-recursor
+#        restart: unless-stopped
         networks:
             pdns.internal.docker:
                 aliases:
     postgresql-slave1:
         build: ./postgresql
         container_name: pdns-postgresql-slave1
+#        restart: unless-stopped
         networks:
             pdns.internal.docker:
                 aliases:
     postgresql-slave2:
         build: ./postgresql
         container_name: pdns-postgresql-slave2
+#        restart: unless-stopped
         networks:
             pdns.internal.docker:
                 aliases: