feat: add docker build for static site

Dockerfile

@@ -0,0 +1,13 @@
+FROM node:20-alpine AS build
+
+WORKDIR /app
+
+COPY package.json package-lock.json ./
+RUN npm ci
+
+COPY . .
+RUN npm run docs:build
+
+FROM nginx:1.25-alpine
+
+COPY --from=build /app/src/.vuepress/dist /usr/share/nginx/html