bump open files and procs limit via unitfile

Docker-DCO-1.1-Signed-off-by: Lokesh Mandvekar <lsm5@redhat.com> (github: lsm5)

	modified:   contrib/init/systemd/docker.service
	modified:   contrib/init/systemd/socket-activation/docker.service

contrib/init/systemd/docker.service

@@ -6,6 +6,8 @@ After=network.target
 [Service]
 ExecStart=/usr/bin/docker -d
 Restart=on-failure
+LimitNOFILE=1048576
+LimitNPROC=1048576
 
 [Install]
 WantedBy=multi-user.target

contrib/init/systemd/socket-activation/docker.service

@@ -6,6 +6,8 @@ After=network.target
 [Service]
 ExecStart=/usr/bin/docker -d -H fd://
 Restart=on-failure
+LimitNOFILE=1048576
+LimitNPROC=1048576
 
 [Install]
 WantedBy=multi-user.target