docs(*): update references to the new base image, alpine

Author: fabiob

builder/README.md

@@ -3,7 +3,7 @@
 A Docker image that builds Docker images, for use in the [Deis](http://deis.io/) open source PaaS.
 
 This Docker image is based on the official
-[ubuntu-debootstrap:14.04](https://registry.hub.docker.com/_/ubuntu/) image.
+[alpine:3.1](https://registry.hub.docker.com/_/alpine/) image.
 
 Please add any [issues](https://github.com/deis/deis/issues) you find with this software to
 the [Deis Project](https://github.com/deis/deis).

cache/README.md

@@ -3,7 +3,7 @@
 A Redis cache server for use in the [Deis](http://deis.io/) open source PaaS.
 
 This Docker image is based on the official
-[ubuntu-debootstrap:14.04](https://registry.hub.docker.com/_/ubuntu/) image.
+[alpine:3.1](https://registry.hub.docker.com/_/alpine/) image.
 
 Please add any [issues](https://github.com/deis/deis/issues) you find with this software to
 the [Deis Project](https://github.com/deis/deis).

controller/README.md

@@ -4,7 +4,7 @@ A RESTful API server for use in the [Deis](http://deis.io) open source PaaS.
 
 
 This Docker image is based on the official
-[ubuntu-debootstrap:14.04](https://registry.hub.docker.com/_/ubuntu/) image.
+[alpine:3.1](https://registry.hub.docker.com/_/alpine/) image.
 
 Please add any [issues](https://github.com/deis/deis/issues) you find with this software to
 the [Deis Project](https://github.com/deis/deis).

database/README.md

@@ -3,7 +3,7 @@
 A PostgreSQL database for use in the [Deis](http://deis.io) open source PaaS.
 
 This Docker image is based on the official
-[ubuntu-debootstrap:14.04](https://registry.hub.docker.com/_/ubuntu/) image.
+[alpine:3.1](https://registry.hub.docker.com/_/alpine/) image.
 
 Please add any [issues](https://github.com/deis/deis/issues) you find with this software to
 the [Deis Project](https://github.com/deis/deis).

logger/README.md

@@ -3,7 +3,7 @@
 A system logger for use in the [Deis](http://deis.io) open source PaaS.
 
 This Docker image is based on the official
-[ubuntu-debootstrap:14.04](https://registry.hub.docker.com/_/ubuntu/) image.
+[alpine:3.1](https://registry.hub.docker.com/_/alpine/) image.
 
 Please add any [issues](https://github.com/deis/deis/issues) you find with this software to
 the [Deis Project](https://github.com/deis/deis).

registry/README.md

@@ -3,7 +3,7 @@
 A Docker image registry for use in the [Deis](http://deis.io) open source PaaS.
 
 This Docker image is based on the official
-[ubuntu-debootstrap:14.04](https://registry.hub.docker.com/_/ubuntu/) image.
+[alpine:3.1](https://registry.hub.docker.com/_/alpine/) image.
 
 Please add any [issues](https://github.com/deis/deis/issues) you find with this software to
 the [Deis Project](https://github.com/deis/deis).

router/README.md

@@ -3,7 +3,7 @@
 An nginx proxy for use in the [Deis](http://deis.io) open source PaaS.
 
 This Docker image is based on the official
-[ubuntu-debootstrap:14.04](https://registry.hub.docker.com/_/ubuntu/) image.
+[alpine:3.1](https://registry.hub.docker.com/_/alpine/) image.
 
 Please add any [issues](https://github.com/deis/deis/issues) you find with this software to
 the [Deis Project](https://github.com/deis/deis).

store/README.md

@@ -7,7 +7,7 @@ The bin/boot scripts and Dockerfiles were inspired by
 Seán C. McCord's [docker-ceph](https://github.com/Ulexus/docker-ceph) repository.
 
 This Docker image is based on the official
-[ubuntu-debootstrap:14.04](https://registry.hub.docker.com/_/ubuntu/) image.
+[alpine:3.1](https://registry.hub.docker.com/_/alpine/) image.
 
 Please add any issues you find with this software to the
 [Deis project](https://github.com/deis/deis/issues).