Fix incorrect command and split into several runs (#19)

* Change node version in Dockerfile and steps

* Change name of scripts in package.json

Dockerfile

@@ -1,11 +1,13 @@
-FROM node:10.19.0
+FROM node:16.8.0
 
 ENV IS_DOCKER=true
 ENV NODE_ENV=production
 
 WORKDIR /app
 COPY ["package.json", "package-lock.json*", "./"]
-RUN npm install && npm build-tails && npm install nodemon
+RUN npm install
+RUN npm install nodemon
 COPY . .
+RUN npm run build-tailwind
 
 CMD [ "npm", "start" ]