chore: import upstream snapshot with attribution

examples/integrations/mastra/docker/Dockerfile.app

@@ -0,0 +1,33 @@
+# Dockerfile for the Mastra + Next.js monolith.
+# Mastra runs in-process with Next.js — no separate agent service needed.
+FROM node:20-slim AS builder
+
+WORKDIR /app
+
+# Install dependencies (no lockfile in this starter)
+COPY package.json ./
+RUN npm install
+
+# Copy source code
+COPY . .
+
+# Build the Next.js application (standalone output)
+RUN npm run build
+
+# Production stage
+FROM node:20-slim AS runner
+
+WORKDIR /app
+
+ENV NODE_ENV=production
+ENV PORT=3000
+ENV HOSTNAME=0.0.0.0
+
+# Copy the standalone build output
+COPY --from=builder /app/.next/standalone ./
+COPY --from=builder /app/.next/static ./.next/static
+COPY --from=builder /app/public ./public
+
+EXPOSE 3000
+
+CMD ["node", "server.js"]