legacy resolver

Dockerfile

@@ -18,7 +18,7 @@ USER user
 # 5. Install Python dependencies
 COPY --chown=user requirements.txt .
 RUN pip install --no-cache-dir --upgrade pip && \
-    pip install --no-cache-dir -r requirements.txt
+    pip install --no-cache-dir --use-deprecated=legacy-resolver -r requirements.txt
 
 # 6. Copy app source code
 COPY --chown=user . .