Add dynamic environment variables to Dockerfile for the npm build script

strapi/Dockerfile

@@ -2,6 +2,13 @@ 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}
@@ -32,10 +39,9 @@ FROM node:18-alpine as production
 
 ARG APP_DIRECTORY
 ARG NODE_ENV
-ENV TIMEZONE "UTC"
 
-# Set local timezone
-RUN ln -snf /usr/share/zoneinfo/${TIMEZONE} /etc/localtime && echo ${TIMEZONE} > /etc/timezone
+# Set dynamic environment variables
+ENV NODE_ENV ${NODE_ENV}
 
 # Upgrade & install image processing dependency
 RUN apk upgrade --no-cache && \