FIX: Dockerfile.

.docker/Dockerfile

@@ -5,9 +5,9 @@ RUN apt-get update \
         make \
         octave \
         python3-pip \
-        python3-sphinx
+        python3-sphinx \
+        wget
 
 RUN pip3 install breathe miss_hit sphinx-rtd-theme recommonmark 
-RUN curl --output generate_doc_unreleased.zip \
-    https://github.com/gnu-octave/generate_doc/archive/refs/heads/main.zip
+RUN wget --output generate_doc_unreleased.zip https://github.com/gnu-octave/generate_doc/archive/refs/heads/main.zip
 RUN octave --eval "pkg install generate_doc_unreleased.zip"