Adds flake, but just builds docker images directly

docker/app.dockerfile

@@ -0,0 +1,11 @@
+FROM node:22-alpine3.20 AS builder
+WORKDIR /app
+COPY package.json package-lock.json ./
+RUN npm install
+COPY . .
+RUN npm run build
+
+FROM nginx:alpine AS runner
+COPY --from=builder /app/dist /usr/share/nginx/html
+EXPOSE 80
+CMD ["nginx", "-g", "daemon off;"]