added Docker

Dockerfile

@@ -0,0 +1,42 @@
+# Use a multi-stage build to optimize the image size
+
+# Stage 1: Build React frontend
+FROM node:14 as frontend-builder
+
+WORKDIR /app/frontend
+
+# Copy frontend code
+COPY frontend/package*.json ./
+RUN npm install
+
+COPY frontend/ ./
+RUN npm run build
+
+# Stage 2: Build FastAPI backend
+FROM python:3.8-slim as backend-builder
+
+WORKDIR /app/backend
+
+# Copy backend code
+COPY backend/requirements.txt ./
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY backend/ ./
+
+# Stage 3: Final stage
+FROM python:3.8-slim
+
+WORKDIR /app
+
+# Copy built frontend from the first stage
+COPY --from=frontend-builder /app/frontend/build /app/frontend/build
+
+# Copy backend from the second stage
+COPY --from=backend-builder /app/backend /app/backend
+
+# Expose ports
+EXPOSE 7860
+EXPOSE 8000
+
+# Start both frontend and backend
+CMD ["sh", "-c", "cd /app/backend && uvicorn main:app --host 0.0.0.0 --port 8000 & cd /app/frontend/build && serve -s -l 7860"]