Add Docker setup for Nginx serving built Node app

Introduce a multi-stage Dockerfile to build and serve a Node.js application using Nginx. Define a custom Nginx configuration for optimized static file handling and enable gzip compression.

Dockerfile

@@ -0,0 +1,11 @@
+FROM node:20-alpine AS build
+WORKDIR /app
+COPY package*.json ./
+RUN npm install
+COPY . .
+RUN npm run build
+
+FROM nginx:stable
+COPY --from=build /app/dist /usr/share/nginx/html
+COPY .docker/app/nginx/nginx.conf /etc/nginx/nginx.conf
+EXPOSE 80