Apparently this does not work with a reverse proxy

strapi/Dockerfile

@@ -2,13 +2,9 @@ FROM node:18-alpine as build
 
 ARG APP_DIRECTORY
 ARG NODE_ENV
-ARG STRAPI_ADMIN_BACKEND_URL
-ARG ADMIN_PATH
 
 # Set dynamic environment variables for the npm build script
 ENV NODE_ENV ${NODE_ENV}
-ENV STRAPI_ADMIN_BACKEND_URL ${STRAPI_ADMIN_BACKEND_URL}
-ENV ADMIN_PATH ${ADMIN_PATH}
 
 # Set working directory
 WORKDIR ${APP_DIRECTORY}