feat: add Docker support and update backend dependencies

- Introduced `requirements.docker.txt` for Docker-specific dependencies.
- Updated `requirements.txt` to include `psycopg[binary]` and `python-multipart`.
- Enhanced test suite in `test_main_endpoints.py` to cover document CRUD operations.
- Modified `docker-compose.yml` to include PostgreSQL and frontend services.
- Added Nginx configuration for reverse proxying API requests.
- Refactored file handling in Vue components to support new document storage backend.
- Created new utility functions in `docsApi.js` for document management.
- Updated configuration to support new API endpoints for document operations.
- Adjusted Vite configuration to proxy API requests to the local backend.

Dockerfile.frontend

@@ -0,0 +1,20 @@
+ARG DOCKER_REGISTRY_PREFIX=
+FROM ${DOCKER_REGISTRY_PREFIX}node:22-alpine AS build
+
+WORKDIR /app
+
+COPY package.json package-lock.json ./
+RUN npm ci
+
+COPY index.html vite.config.js ./
+COPY public ./public
+COPY src ./src
+
+RUN npm run build
+
+FROM ${DOCKER_REGISTRY_PREFIX}nginx:1.27-alpine
+
+COPY docker/nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=build /app/dist /usr/share/nginx/html
+
+EXPOSE 80