chore: import upstream snapshot with attribution

fixtures/interactive-dev-tests/multi-containers-app/DockerfileB

@@ -0,0 +1,20 @@
+FROM node:22-alpine
+
+WORKDIR /usr/src/app
+RUN echo '{"name": "simple-node-app-b", "version": "1.0.0"}' > package.json
+RUN npm install
+
+RUN sleep 1
+
+RUN echo 'const { createServer } = require("http");\
+\
+const server = createServer(function (req, res) {\
+	res.writeHead(200, { "Content-Type": "text/plain" });\
+	res.write("Hello from Container B");\
+	res.end();\
+});\
+\
+server.listen(8080);\
+' > app.js
+
+EXPOSE 8080