added note on homeassistant-pyozw install regarding wheels

Dockerfile

@@ -16,8 +16,10 @@ VOLUME /config
 USER hass
 ENV PATH "/home/hass/.local/bin:${PATH}"
 
-# https://github.com/home-assistant/home-assistant/blob/0.89.0/requirements_all.txt
+# no wheels available for homeassistant-pyozw
+# https://pypi.org/project/homeassistant-pyozw/0.1.2/#files
 RUN pip install --user --no-cache-dir homeassistant-pyozw==0.1.2
+# https://github.com/home-assistant/home-assistant/blob/0.89.0/requirements_all.txt
 COPY --chown=hass ./runtime-requirements.txt /tmp
 RUN pip install --user --no-cache-dir --requirement /tmp/runtime-requirements.txt \
     && rm /tmp/runtime-requirements.txt