Updated versions and added README.md

Dockerfile

@@ -50,7 +50,7 @@ COPY sbclrc /root/.sbclrc
 
 RUN git clone https://git.code.sf.net/p/maxima/code maxima-code && \
     cd maxima-code && \
-    git checkout 79a9724cbf231c53f5ee4e8c9956ccfaad9ebada
+    git checkout 05f927b12e3421cec6b74b8f4bc0d5be0fed257f
 
 RUN cd maxima-code && \
     mkdir dist && \
@@ -61,7 +61,7 @@ RUN cd maxima-code && \
 
 RUN git clone https://github.com/lokedhs/maxima-client.git && \
     cd maxima-client && \
-    git checkout 80032858ee0e9178c149f1d647eebacc771ef558
+    git checkout 6b4df0deea0a393181f056ea3c41f22a6ff9c6ae
 
 RUN git clone https://github.com/McCLIM/McCLIM.git && \
     cd McCLIM && \

README.md

@@ -0,0 +1,24 @@
+Maxima-Client Appimage build
+============================
+
+This is a docker container that is used to build the Appimage version
+of Climaxima.
+
+To build the Appimage, run the following command:
+
+```
+$ docker build -t maxima .
+```
+
+Assuming everything built correctly, run the following command to copy
+the Appimage from the container:
+
+```
+$ docker run maxima cat climaxima-x86_64.AppImage > climaxima-x86_64.AppImage
+```
+
+Finally, set the executable flag so that the executable can be run:
+
+```
+$ chmod +x climaxima-x86_64.AppImage
+```