Create DockerFile

.dockerignore

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+# node_modules contains dependecies necessary only for build
+node_modules
+
+# directory will be autogenerated on a successfull build
+dist
+
+# not necessary for a build
+test

Dockerfile

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+FROM node:14-alpine as build-stage
+WORKDIR /app
+COPY package*.json ./
+RUN npm ci
+WORKDIR /app
+COPY ./ .
+RUN npm run build
+
+FROM node:14-alpine as production-stage
+COPY --from=build-stage /app/dist ./dist
+
+USER node
+ENV PORT=8081
+EXPOSE 8081
+
+CMD [ "node", "dist/main.js" ]