FROM nginx:alpine EXPOSE 80 ENV LISTEN_PORT=80 \ SERVER_URL=otrecorder \ SERVER_PORT=80 COPY nginx.tmpl /etc/nginx/nginx.tmpl COPY index.html /usr/share/nginx/html COPY static/ /usr/share/nginx/html/static/ RUN ls /usr/share/nginx/html/* CMD /bin/sh -c "envsubst '\${SERVER_URL} \${SERVER_PORT} \${LISTEN_PORT}' < /etc/nginx/nginx.tmpl > /etc/nginx/nginx.conf && nginx -g 'daemon off;' || cat /etc/nginx/nginx.conf"