Dashboard render failed with timeout

[diafour]

Reproduce:

1. start docker, login into grafana, create and save dashboard with graph panel.
2. add /render at the beginning of url (/render/d/6PJB0E1ik/new-dashboard-copy?orgId=1) — it works OK, browser displays png
3. add statusmap panel, save dashboard
4. add /render again — grafana gives error 500 and timeout error in logs:

INFO[10-12|09:06:19] Rendering                                logger=png-renderer path="d/6PJB0E1ik/new-dashboard-copy?orgId=1"
EROR[10-12|09:07:19] Timeout error. You can set timeout in seconds with &timeout url parameter logger=context userId=1 orgId=1 uname=admin error="Timeout error. You can set timeout in seconds with &timeout url parameter"
EROR[10-12|09:07:19] Request Completed                        logger=context userId=1 orgId=1 uname=admin method=GET path=/render/d/6PJB0E1ik/new-dashboard-copy status=500 remote_addr=172.17.0.1 time_ms=60042 size=1763 referer=

Thanks korki!