📝 Added sandbox (code sketchbook)

sandbox/docker_web_app/Dockerfile

@@ -0,0 +1,19 @@
+FROM node:18
+
+# Create app directory
+WORKDIR /usr/src/app
+
+# Install app dependencies
+# A wildcard is used to ensure both apckage.json AND package-lock.json are
+# copied where available (npm@5+)
+COPY package*.json ./
+
+RUN npm install
+# If you are building your code for production
+# RUN npm ci --omit=dev
+
+# BUNDLE app source
+COPY . .
+
+EXPOSE 8080
+CMD ["node", "server.js"]