Update docker config, setup a multi stage setup, and build blender from source

Dockerfile

@@ -40,12 +40,12 @@ RUN mkdir /opt/blender-git/ && cd /opt/blender-git/ \
     && git submodule update --init --recursive \
     && make
 
-#RUN cd /opt/blender-git/build_linux/bin \
-#    && ls -la \
-
 # Setup a Multistage optimisation
 FROM ubuntu:latest
 COPY --from=blender /opt/blender-git/build_linux/bin /opt/blender
+ARG b3d_vs_major
+ENV B3D_ADDON_PATH "$HOME/.config/blender/${b3d_vs_major}/scripts/addons"
+
 RUN apt-get update && apt-get install -y \
     libxi6 \
     libxxf86vm1 \