Add Dockerfile for deployment

Dockerfile

@@ -0,0 +1,36 @@
+FROM node:20-alpine AS deps
+
+RUN apk add --no-cache python3 make g++
+
+WORKDIR /app
+
+COPY package.json pnpm-lock.yaml* ./
+RUN corepack enable && corepack prepare pnpm@9.0.0 --activate
+RUN pnpm install --frozen-lockfile
+
+FROM deps AS builder
+
+WORKDIR /app
+
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+
+RUN pnpm build
+
+FROM deps AS runner
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+
+RUN adduser --system --uid 1001 astro
+USER astro
+
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/dist ./dist
+COPY --from=builder /app/public ./public
+COPY --from=builder /app/data.db ./data.db
+
+EXPOSE 4321
+
+CMD ["node", "./dist/server/entry.mjs"]