Dockerize client, server, and postgres database for production with container healthchecks

client/Dockerfile

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+# --- Build Stage ---
+FROM node:20-alpine AS builder
+WORKDIR /app
+
+# Install dependencies
+COPY package*.json ./
+RUN npm ci
+
+# Copy code and build production bundle
+COPY . .
+RUN npm run build
+
+# --- Production Stage ---
+FROM nginx:1.25-alpine
+WORKDIR /usr/share/nginx/html
+
+# Copy custom Nginx configuration
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+
+# Copy built assets from builder
+COPY --from=builder /app/dist .
+
+# Expose HTTP port
+EXPOSE 80
+
+# Health check to verify Nginx is actively running
+HEALTHCHECK --interval=30s --timeout=5s --start-period=3s --retries=3 \
+  CMD wget --no-verbose --tries=1 --spider http://localhost:80/ || exit 1