added dockerfile

Author: Fernando Ledesma

mdk-nextjs-demo/Dockerfile

@@ -0,0 +1,48 @@
+#syntax=docker.io/docker/dockerfile:1
+
+FROM node:20-alpine AS base
+
+# Dependencies stage
+FROM base AS dependencies
+WORKDIR /app
+
+# Install curl and jq for healthchecks and JSON manipulation
+RUN apk add --no-cache curl libc6-compat jq
+
+# Copy package files
+COPY package.json package-lock.json* ./
+
+# Install dependencies
+RUN npm install
+
+# Copy the rest of the app
+COPY . .
+
+# Builder stage - creates production build
+FROM dependencies AS builder
+WORKDIR /app
+
+# Build the Next.js app with all env vars available
+RUN npm run build
+
+# Production image - run Next.js in production mode
+FROM base AS production
+WORKDIR /app
+
+# Install curl for healthchecks
+RUN apk add --no-cache curl libc6-compat
+
+# Copy necessary files from builder
+COPY --from=builder /app/package.json ./
+COPY --from=builder /app/node_modules ./node_modules
+COPY --from=builder /app/.next ./.next
+COPY --from=builder /app/next.config.mjs ./next.config.mjs
+
+EXPOSE 3000
+
+ENV PORT=3000
+ENV HOSTNAME="0.0.0.0"
+ENV NODE_ENV=production
+
+# Start Next.js in production mode
+CMD ["npm", "start"]