docker file with proper shell, pg_isready

Dockerfile

@@ -1,6 +1,10 @@
-FROM scratch
+FROM centos:7
+MAINTAINER sathishvj
 
-# ENTRYPOINT ["/exposecontroller"]
-ENTRYPOINT ["/fabric8-dependency-wait-service"]
+RUN yum install -y centos-release-scl-rh && \
+         yum install -y rh-postgresql95-postgresql && \
+         ln -s /opt/rh/rh-postgresql95/root/usr/lib64/libpq.so.rh-postgresql95-5 /usr/lib64/libpq.so.rh-postgresql95-5 && \
+		 curl -o /usr/bin/fabric8-dependency-wait-service-linux-amd64 -L https://github.com/fabric8-services/fabric8-dependency-wait-service/releases/download/v0.0.7/fabric8-dependency-wait-service-linux-amd64 && \ 
+		 chmod +x /usr/bin/fabric8-dependency-wait-service-linux-amd64
 
-COPY ./out/fabric8-dependency-wait-service-linux-amd64 /fabric8-dependency-wait-service
+ENV PATH=${PATH}:/opt/rh/rh-postgresql95/root/usr/bin