Fixing entrypoint.

Author: ssuareza

Dockerfile

@@ -0,0 +1,4 @@
+FROM alpine:3.7
+RUN apk --update add postgresql-client && rm -rf /var/cache/apk/*
+COPY . /
+ENTRYPOINT ["./entrypoint.sh"]

README.md

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+# Postgresql Client
+
+This client is compatible with the official postgresql image, which means that it uses the environment variables provided by the image.
+
+## Usage
+
+### Create a postgres database
+
+```
+docker run -e POSTGRES_HOST=host POSTGRES_USER=user -e POSTGRES_PASS=pwd -d --name=postgresql-client "CREATE DATABASE mydb;"
+```
+
+### Use psql or pg_dump command
+
+```
+docker run --rm --link pg_container:db kalumkalac/postgresql-client:9.5 psql -c 'create database foo'
+docker run --rm --link pg_container:db -v /tmp/foo:/dump kalumkalac/postgresql-client:9.5 pg_dump foo -f /dump/dump_foo.sql
+```

entrypoint.sh

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+#!/bin/sh
+echo "${POSTGRES_HOST}":*:*:"${POSTGRES_USER}":"${POSTGRES_PASS}" > ~/.pgpass
+chmod 0600 ~/.pgpass
+cat ~/.pgpass
+psql -h ${POSTGRES_HOST} -U ${POSTGRES_USER} -w postgres -c "$@"