allow configuration of auth_proxy_pass through

environment variable

Dockerfile

@@ -11,6 +11,7 @@ RUN npm run build
 FROM nginx:stable-alpine as production-stage
 COPY --from=build-stage /app/dist /app/eo-services
 COPY nginx.conf /etc/nginx/nginx.conf
+COPY default.conf.template /etc/nginx/templates/default.conf.template
 COPY headers.js /etc/nginx/headers.js
 EXPOSE 80
 CMD ["nginx", "-g", "daemon off;"]