Add Dockerfile for Node.js application setup

Dockerfile

@@ -0,0 +1,13 @@
+FROM node:20-bullseye
+
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+
+COPY . .
+RUN npm run build
+
+RUN npm install -g serve
+
+EXPOSE 7860
+CMD ["serve", "-s", "dist", "-l", "7860"]