add docker container deployment support

Dockerfile

@@ -0,0 +1,16 @@
+FROM node:20-slim
+
+RUN apt-get update && apt-get install -y --no-install-recommends openssl ca-certificates \
+  && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+ENV NODE_ENV=production
+
+COPY package*.json ./
+COPY prisma ./prisma
+RUN npm ci --omit=dev
+
+COPY src ./src
+
+EXPOSE 3000
+CMD ["sh", "-c", "npx prisma migrate deploy && node src/index.js"]