The property name is WEBSITES_PORT as referenced by twoarticles that reference this repository and as confirmed by Kudu logs for my running App Service for Containers instance. The following shows the app settings that are indeed passed to containers. I made available both WEBSITES_PORT and WEBSITE_PORT and only WEBSITES_PORT was passed to Kudu:
2018-04-10 04:16:49.312 INFO - Logging is not enabled for this container. Please use https://aka.ms/linux-diagnostics to enable logging to see container logs here. 2018-04-10 04:16:51.819 INFO - Starting container for site 2018-04-10 04:16:51.825 INFO - docker run -d -p 62966:8080 --name [xxx] -e WEBSITES_ENABLE_APP_SERVICE_STORAGE=false -e DOCKER_CUSTOM_IMAGE_NAME=[xxx] -e WEBSITES_PORT=8080 -e WEBSITE_SITE_NAME=[xxx] -e WEBSITE_AUTH_ENABLED=False -e WEBSITE_ROLE_INSTANCE_ID=0 -e WEBSITE_INSTANCE_ID=[xxx]
The property name is
WEBSITES_PORTas referenced by two articles that reference this repository and as confirmed by Kudu logs for my running App Service for Containers instance. The following shows the app settings that are indeed passed to containers. I made available bothWEBSITES_PORTandWEBSITE_PORTand onlyWEBSITES_PORTwas passed to Kudu:2018-04-10 04:16:49.312 INFO - Logging is not enabled for this container. Please use https://aka.ms/linux-diagnostics to enable logging to see container logs here. 2018-04-10 04:16:51.819 INFO - Starting container for site 2018-04-10 04:16:51.825 INFO - docker run -d -p 62966:8080 --name [xxx] -e WEBSITES_ENABLE_APP_SERVICE_STORAGE=false -e DOCKER_CUSTOM_IMAGE_NAME=[xxx] -e WEBSITES_PORT=8080 -e WEBSITE_SITE_NAME=[xxx] -e WEBSITE_AUTH_ENABLED=False -e WEBSITE_ROLE_INSTANCE_ID=0 -e WEBSITE_INSTANCE_ID=[xxx]