feat: Override environment variable (#87)

Dockerfile

@@ -21,9 +21,11 @@ RUN chmod +x /run/*.sh
 EXPOSE 8006 3389
 VOLUME /storage
 
+ENV BOOT ""
 ENV RAM_SIZE "4G"
 ENV CPU_CORES "2"
 ENV DISK_SIZE "64G"
+ENV VERSION "win11"
 
 ARG VERSION_ARG "0.0"
 RUN echo "$VERSION_ARG" > /run/version