feat: add Docker deployment to diet.dshkabatur.ru

- Add multi-stage Dockerfile (node:22-alpine build → nginx:alpine serve)
- Add nginx.conf for SPA routing inside container
- Add .dockerignore
- Deploy to dshkabatur.ru server with Docker + host Nginx + SSL (Certbot)
- Live at https://diet.dshkabatur.ru

Co-authored-by: Cursor <cursoragent@cursor.com>

Dockerfile

@@ -0,0 +1,11 @@
+FROM node:22-alpine AS build
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm ci
+COPY . .
+RUN npm run build
+
+FROM nginx:alpine
+COPY docker/nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=build /app/dist /usr/share/nginx/html
+EXPOSE 80