Added docker production setup, updated README

Dockerfile

@@ -0,0 +1,43 @@
+FROM node:18-alpine as pre-production
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+COPY . .
+
+#COPY package.json .
+#COPY package-lock.json .
+
+RUN npm i
+
+RUN npm run build
+
+FROM --platform=linux/amd64 node:18-alpine as production
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+ENV NODE_ENV=production
+
+COPY --from=pre-production /usr/src/app/build ./build
+
+COPY package.json .
+COPY package-lock.json .
+
+RUN npm ci --omit dev
+
+CMD [ "PORT", "9494", "node", "build" ]
+
+FROM node:18 as development
+
+ENV NODE_ENV=development
+
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+
+COPY package.json .
+COPY package-lock.json .
+
+RUN npm i
+
+CMD [ "npm", "run", "dev" ]