Change the username to quickref in the Docker image.

Improve the README section on building them.

README.md

@@ -44,7 +44,7 @@ sudo dockerd
 When Quickref is done (this *will* take a while), you can extract the website
 from the container by typing this:
 ```
-docker cp quickref:~quickbuilder/quickref .
+docker cp quickref:~quickref/quickref .
 ```
 
 The website will be located under `quickref/website`. You will also see a
@@ -93,9 +93,9 @@ separate images:
 
   * `Buildenv` creates a Debian 8 image with all the dependencies needed to
   buid the various Quicklisp libraries inside.
-  * `Quickref` builds on top of the `Buildenv` image to set up a
-  `quickbuilder` user, pull the latest versions of Quickref and Declt, and
-  finally launch Quickref.
+  * `Quickref` builds on top of the `Buildenv` image to set up a `quickref`
+  user, pull the latest versions of Quickref and Declt, and finally launch
+  Quickref.
 
 With this 2-steps process, it is possible to rebuild the final Quickref image
 with the latest Quicklisp without rebuilding the whole environment (including
@@ -106,20 +106,12 @@ the hundreds of dependencies installed from `apt`).
 The two Quickref Docker images are created by typing respectively (and in that
 order):
 ```
-docker build -t quickref/buildenv -f Buildenv .
-docker build -t quickref -f Quickref .
+docker build -t myquickref/buildenv -f Buildenv .
+docker build -t myquickref -f Quickref .
 ```
 
-### Extracting the website
-With `docker ps -a`, get the name/ID of your image. The output should look
-like this (with a different name/ID for you):
+Then, as before, run it and extract the result like this:
 ```
-CONTAINER ID    IMAGE       COMMAND   CREATED         STATUS                     PORTS   NAMES
-2b67991057f4    quickref    "bash"    6 seconds ago   Exited (0) 2 seconds ago           sleepy_morse
-```
-
-Then, extract the website from the container just like with the official
-image:
-```
-docker cp sleepy_morse:~quickbuilder/quickref .
+docker run --name myquickref myquickref
+docker cp myquickref:~quickref/quickref .
 ```

docker/Quickref

 FROM quickref/buildenv
 
 # Quickref User
-RUN useradd -m -s /bin/bash quickbuilder \
-	&& chown -R quickbuilder:quickbuilder /home/quickbuilder
-WORKDIR /home/quickbuilder
-USER quickbuilder
+RUN useradd -m -s /bin/bash quickref \
+	&& chown -R quickref:quickref /home/quickref
+WORKDIR /home/quickref
+USER quickref
 
 # Common Lisp Packages
 RUN mkdir common-lisp \