create .cache dir

Dockerfile

@@ -21,6 +21,7 @@ RUN apt-get update && \
 # populate cache; this works around HuggingFace egress restrictions
 RUN curl -fsSL "https://ndurner.de/download/aileen3/aileen3-cache.zip" -o /tmp/aileen3-cache.zip && \
     unzip -q /tmp/aileen3-cache.zip -d /tmp && \
+    mkdir -p /root/.cache && \
     mv /tmp/aileen3-cache /root/.cache/aileen3 && \
     rm -rf /tmp/aileen3-cache.zip