Add dockerfile and remove package manager

Dockerfile

@@ -0,0 +1,15 @@
+FROM node:16-alpine3.11
+
+RUN mkdir -p /usr/src/fallback
+
+WORKDIR /usr/src/fallback
+
+COPY . /usr/src/fallback
+
+RUN yarn install
+
+RUN yarn build
+
+EXPOSE 3355
+
+CMD ["yarn", "preview"]

package.json

@@ -1,6 +1,5 @@
 {
   "private": true,
-  "packageManager": "pnpm@7.1.5",
   "scripts": {
     "build": "vite build",
     "dev": "vite --port 3333 --open",