Taiga container exiting automaically

[suren2306]

I cloned the repo updated the hostname in docker-compose.yml and started the docker composer using docker-compose up
The taiga_taiga container exited automatically, below are the logs

[user1@myserv taiga]# docker logs 5dc1e01be76a
Running database check
Connecting to database:
dbname='taigadb' user='taiga' host='postgres' password='password'
Traceback (most recent call last):
File "/checkdb.py", line 14, in <module>
conn = psycopg2.connect(conn_string)
File "/usr/local/lib/python3.5/site-packages/psycopg2/__init__.py", line 130, in connect
conn = _connect(dsn, connection_factory=connection_factory, **kwasync)
psycopg2.OperationalError: could not connect to server: Connection refused
Is the server running on host "postgres" (172.22.0.2) and accepting TCP/IP connections on port 5432 ?
Failed to connect to database server or database does not exist