Dockerfile: also install python3-wheel, needed for pip bdist_wheel

docker/Dockerfile

@@ -5,7 +5,7 @@ RUN apt-get update && \
     apt-get install --no-install-recommends --yes \
         curl time \
         gcc pkg-config libsystemd-dev python3-dev \
-        python3-pip python3-setuptools && \
+        python3-pip python3-setuptools python3-wheel && \
     rm -rf /var/lib/apt/lists/* && \
     pip3 install swh.graph