Fix: pg_isready command not found

[harishanand95]

Docker build command

Step 13/14 : RUN apt-get install -y postgresql-client
---> Running in dc1c0869eb20
Reading package lists...
Building dependency tree...
Reading state information...
The following extra packages will be installed:
libpq-dev libpq5 postgresql-client-9.4
Suggested packages:
postgresql-doc-9.4 postgresql-9.4
The following NEW packages will be installed:
postgresql-client postgresql-client-9.4
The following packages will be upgraded:
libpq-dev libpq5
2 upgraded, 2 newly installed, 0 to remove and 66 not upgraded.
Need to get 1450 kB of archives.
After this operation, 4792 kB of additional disk space will be used.
Get:1 http://security.debian.org/ jessie/updates/main libpq-dev amd64 9.4.19-0+deb8u1 [167 kB]
Get:2 http://security.debian.org/ jessie/updates/main libpq5 amd64 9.4.19-0+deb8u1 [128 kB]
Get:3 http://security.debian.org/ jessie/updates/main postgresql-client-9.4 amd64 9.4.19-0+deb8u1 [1102 kB]
Get:4 http://deb.debian.org/debian/ jessie/main postgresql-client all 9.4+165+deb8u3 [52.4 kB]
debconf: delaying package configuration, since apt-utils is not installed

After adding apt-utils, command pg_isready is properly installed. It seems postgresql-client package is not installed due to this error.