Update Dockerfile

Dockerfile

@@ -30,6 +30,15 @@ WORKDIR /code
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt
 
+# ---- PRE-DOWNLOAD Czech SBERT so runtime never pulls ----
+RUN python - <<'PY'
+from sentence_transformers import SentenceTransformer
+SentenceTransformer(
+    'Seznam/simcse-small-e-czech',
+    cache_folder='/tmp/hfcache'
+)
+PY
+
 COPY app.py .
 
 EXPOSE 7860