Dockerfile adjustments

Dockerfile

@@ -1,12 +1,12 @@
-FROM node:10-alpine AS builder
+FROM node:12-alpine AS builder
 WORKDIR /app
 COPY package*.json ./
 RUN npm install
 COPY . .
 RUN npm run build:prod
-# change setup to use shared folder inside the build
 
-FROM nginx
-LABEL maintainer="Jan Schulte <[email protected]>"
+FROM nginx:1.17.8-alpine
 COPY nginx/default.conf /etc/nginx/conf.d
 COPY --from=builder /app/dist/frontend /usr/share/nginx/html
+# the container can be started like this: docker run -p 80:80 -e PORT=80 mviz-demonstrator
+CMD sed -i -e 's/$PORT/'"$PORT"'/g' /etc/nginx/conf.d/default.conf && nginx -g 'daemon off;'

nginx/default.conf

@@ -1,6 +1,5 @@
 server {
-  listen 80;
-  server_name localhost;
+  listen $PORT;
 
   location / {
     root /usr/share/nginx/html;