fix: update Dockerfile paths for Hugging Face build

Dockerfile

@@ -12,13 +12,13 @@ RUN apt-get update && apt-get install -y \
 WORKDIR /app
 
 # Copy package files
-COPY fly-server/package*.json ./
+COPY legacy_configs/fly/fly-server/package*.json ./
 
 # Install dependencies
 RUN npm install
 
 # Copy server code
-COPY fly-server/server.js ./
+COPY legacy_configs/fly/fly-server/server.js ./
 
 # Expose port (7860 is default for Hugging Face Spaces)
 EXPOSE 7860