Update Dockerfile

Dockerfile

@@ -12,7 +12,23 @@ WORKDIR /app
 
 COPY . /app
 
-RUN pip install --no-cache-dir PyYAML && pip install --no-cache-dir -e .
+RUN pip install --no-cache-dir PyYAML mistralai && pip install --no-cache-dir -e . && \
+    python - <<'PY'
+from pathlib import Path
+
+path = Path("/app/cmbagent/utils/ocr.py")
+text = path.read_text()
+
+old = "from mistralai import Mistral, DocumentURLChunk"
+new = """try:
+    from mistralai import Mistral, DocumentURLChunk
+except Exception:
+    Mistral = None
+    DocumentURLChunk = None
+"""
+
+path.write_text(text.replace(old, new))
+PY
 
 EXPOSE 7860