update readme

README.md

@@ -87,8 +87,11 @@ services:
 
 ### helloworld with socat
 
-> socat could be handy when you need to see the flow between the client and the
+socat could be handy when you need to see the TLS flow between the reverse
-> backend. Minimum socat version should be [1.7.3.2](https://fossies.org/linux/privat/socat-1.7.3.2.tar.gz/socat-1.7.3.2/CHANGES) so it will work with the
+proxy and a backend. It may also let you secure the traffic between them in
+case when the backend application does not support TLS on its own.
+
+> Minimum socat version should be [1.7.3.2](https://fossies.org/linux/privat/socat-1.7.3.2.tar.gz/socat-1.7.3.2/CHANGES) so it will work with the
 > ECDHE- OpenSSL ciphers.
 
 ```
@@ -97,10 +100,8 @@ services:
     image: dockercloud/hello-world
     volumes:
       - /srv/services/gencert/gencert.sh:/gencert.sh:ro
-    entrypoint: sh -c "mkdir /certs &&
+    entrypoint: sh -c "mkdir /certs && cd /certs &&
-                       cd /certs &&
                        /gencert.sh --cn helloworld &&
-                       apk --update add socat &&
                        ( nohup /run.sh & ) &&
                        echo '@edge http://nl.alpinelinux.org/alpine/edge/main' | tee -a /etc/apk/repositories &&
                        apk --update add socat@edge &&