tests: fix docker run command in config

Author: Jeff Chen

.circleci/config.yml

@@ -29,7 +29,7 @@ workflows:
                   IMAGES=$(docker images --format='{{.Repository}}:{{.Tag}}' | grep "ccitest/postgres")
                   for IMAGE in $IMAGES; do
                     printf "Booting $IMAGE...\n"
-                    CONTAINER_ID=$(docker run --rm --env POSTGRES_USER=user --env POSTGRES_PASSWORD=passw0rd -p 5432:5432 -c 'config_file=/etc/postgresql/postgresql.conf' -d $IMAGE)
+                    CONTAINER_ID=$(docker run --rm --env POSTGRES_USER=user --env POSTGRES_PASSWORD=passw0rd -p 5432:5432 -d $IMAGE postgres -c 'config_file=/etc/postgresql/postgresql.conf')
                     for i in {1..20}; do
                       printf "[$i/20] Checking Postgres is up...\n"
                       pg_isready -h 127.0.0.1

README.md

@@ -156,7 +156,12 @@ When releasing proper images for CircleCI, this script is run from a CircleCI pi
 Because some configurations for postgres are enabled at runtime, it is difficult if not impossible to change certain settings.
 As a result, we've provided a configuration file within this repository that allows you to import certain properties that can support your use case. This is located at the project root under `postgres.conf`, however, you would be able to supply a custom configuration file yourself. In doing so, you would also need to specify this file when running the docker container.
 
-For example, in the `.circleci/config.yml`, we are using it with this command; specifically, the "-c 'config_file=xxx'" addition. `docker run --rm --env POSTGRES_USER=user --env POSTGRES_PASSWORD=passw0rd -p 5432:5432 -c 'config_file="/etc/postgresql/postgresql.conf' -d $IMAGE`
+For example, in the `.circleci/config.yml`, we are using it with this command; specifically, the "postgres -c 'config_file=xxx'" addition.
+
+```bash
+docker run --rm --env POSTGRES_USER=user --env POSTGRES_PASSWORD=passw0rd -p 5432:5432 -d $IMAGE postgres -c 'config_file=/etc/postgresql/postgresql.conf'
+```
+
 
 For additional resources on how to configure, you would be able to visit [this link](https://github.com/docker-library/docs/blob/master/postgres/README.md#database-configuration) for additional details.