feat: dockerize client (nginx) and server (node) with docker-compose

server/.dockerignore

@@ -0,0 +1,3 @@
+node_modules
+*.log
+.env

server/Dockerfile

@@ -0,0 +1,20 @@
+# ── Stage 1 : deps ───────────────────────────────────────────────────────────
+FROM node:20-alpine AS deps
+
+WORKDIR /app
+COPY package.json package-lock.json* ./
+RUN npm ci --omit=dev
+
+# ── Stage 2 : runtime ─────────────────────────────────────────────────────────
+FROM node:20-alpine
+
+WORKDIR /app
+
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+
+ENV NODE_ENV=production
+ENV PORT=3000
+
+EXPOSE 3000
+CMD ["node", "src/index.js"]