Add Docker support with Dockerfile and .dockerignore

Dockerfile

@@ -0,0 +1,18 @@
+FROM node:23.7.0-alpine3.21 as builder
+
+WORKDIR /app
+
+COPY package*.json .
+RUN npm ci --omit=dev && npm cache clean --force
+
+COPY . .
+
+RUN npm run build
+
+FROM nginx:alpine
+
+COPY --from=builder /app/dist /usr/share/nginx/html
+
+EXPOSE 3006
+
+CMD ["nginx", "-g", "daemon off;"]