Update next.config.js for standalone output and enhance README with Docker instructions and installation updates

Dockerfile

@@ -0,0 +1,61 @@
+# Stage 1: Dependencies
+FROM node:20-alpine AS deps
+RUN apk add --no-cache libc6-compat
+WORKDIR /app
+
+# Copy package files
+COPY package.json pnpm-lock.yaml* ./
+
+# Install pnpm if not available
+RUN corepack enable && corepack prepare pnpm@latest --activate
+
+# Install dependencies
+RUN pnpm install --frozen-lockfile
+
+# Stage 2: Builder
+FROM node:20-alpine AS builder
+WORKDIR /app
+
+# Copy dependencies from deps stage
+COPY --from=deps /app/node_modules ./node_modules
+COPY . .
+
+# Enable pnpm
+RUN corepack enable && corepack prepare pnpm@latest --activate
+
+# Set environment variable for build
+ENV NEXT_TELEMETRY_DISABLED 1
+
+# Create public directory if it doesn't exist
+RUN mkdir -p public
+
+# Build the application
+RUN pnpm run build
+
+# Stage 3: Runner
+FROM node:20-alpine AS runner
+WORKDIR /app
+
+ENV NODE_ENV production
+ENV NEXT_TELEMETRY_DISABLED 1
+
+RUN addgroup --system --gid 1001 nodejs
+RUN adduser --system --uid 1001 nextjs
+
+# Copy necessary files from builder
+# Create public directory first
+RUN mkdir -p ./public
+# Copy public directory (will work now that we have public/.gitkeep in source)
+COPY --from=builder --chown=nextjs:nodejs /app/public ./public
+COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
+COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static
+
+USER nextjs
+
+EXPOSE 3000
+
+ENV PORT 3000
+ENV HOSTNAME "0.0.0.0"
+
+CMD ["node", "server.js"]
+