Update Dockerfile

Dockerfile

+FROM nginx:1.14
+
+LABEL maintainer="ensembl-webteam@ebi.ac.uk"
+
+EXPOSE 80 8000
+
+RUN rm /etc/nginx/conf.d/*
+
+COPY ensembl-client-nginx/config/conf.d/local.conf /etc/nginx/conf.d/local.conf
+COPY ensembl-client-nginx/config/conf.d/mime.types /etc/nginx/conf.d/mime.types
+
+COPY src/ensembl/dist /usr/staticfiles
+
+COPY ensembl-2020-static-assests/genome-images /usr/genomes-staticfiles/