chore: import upstream snapshot with attribution

examples/integrations/ms-agent-framework-dotnet/Dockerfile

@@ -0,0 +1,59 @@
+# Stage 1: Build Next.js frontend
+FROM node:20-slim AS frontend
+
+WORKDIR /app
+
+COPY package.json pnpm-lock.yaml* ./
+RUN npm install --ignore-scripts
+
+# Fix CVE: Railway scans package.json, so we update it too
+RUN npm install next@latest && \
+    node -e "const p=require('./package.json'); p.dependencies.next='^16'; require('fs').writeFileSync('package.json',JSON.stringify(p,null,2))"
+
+COPY src/ ./src/
+COPY public/ ./public/
+COPY next.config.ts tsconfig.json postcss.config.mjs next-env.d.ts ./
+
+# Patch next.config.ts to ignore TS errors during build (can't modify original source)
+RUN node -e "const fs=require('fs'); const f='next.config.ts'; let c=fs.readFileSync(f,'utf8'); if(!c.includes('ignoreBuildErrors')){c=c.replace('};','  typescript: { ignoreBuildErrors: true },\n};'); fs.writeFileSync(f,c);}"
+
+RUN npm run build
+
+# Stage 2: Build .NET agent
+FROM mcr.microsoft.com/dotnet/sdk:9.0 AS dotnet-build
+
+WORKDIR /agent
+COPY agent/ ./
+RUN dotnet publish -c Release -o /agent/out
+
+# Stage 3: Production image
+FROM mcr.microsoft.com/dotnet/aspnet:9.0 AS runner
+
+# Install Node.js 20
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends curl ca-certificates && \
+    curl -fsSL https://deb.nodesource.com/setup_20.x | bash - && \
+    apt-get install -y --no-install-recommends nodejs && \
+    apt-get clean && rm -rf /var/lib/apt/lists/*
+
+WORKDIR /app
+
+# Copy Next.js build output and production node_modules
+COPY --from=frontend /app/.next ./.next
+COPY --from=frontend /app/node_modules ./node_modules
+COPY --from=frontend /app/package.json ./
+COPY --from=frontend /app/public ./public
+
+# Copy .NET agent build output
+COPY --from=dotnet-build /agent/out ./agent/
+
+# Copy entrypoint
+COPY entrypoint.sh ./
+RUN chmod +x entrypoint.sh
+
+EXPOSE 3000
+
+ENV NODE_ENV=production
+ENV ASPNETCORE_ENVIRONMENT=Production
+
+CMD ["./entrypoint.sh"]