cachet installation using docker run

Hi i installed cachethq using docker using commands
$ docker run --name postgres -e POSTGRES_USER=postgres -e POSTGRES_PASSWORD=postgres -d postgres:9.5

$ docker run -d --name cachet --link postgres -e DB_DRIVER=pgsql -e DB_HOST=postgres -e DB_DATABASE=postgres -e DB_USERNAME=postgres -e DB_PASSWORD=postgres -d cachethq/docker:latest
but am seeing docker ps -a its running but from web access it is showing The connection has timed out
output of docker ps -a is
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
5ad5453cfec7 cachethq/docker:latest "/sbin/entrypoint.sh" 32 minutes ago Up 32 minutes 80/tcp, 8000/tcp cachet
9e522ae92925 postgres:9.5 "docker-entrypoint.s…" 37 minutes ago Up 37 minutes 5432/tcp postgres
am accessing through : http://public ip of server:8000/setup