docker: make the queue worker --memory argument configurable (#3123)

Author: zackgalbreath

docker/docker-entrypoint.sh

@@ -43,7 +43,7 @@ if [ "$1" = "start-website" ] ; then
 # If the start-worker argument was provided, start a worker process instead
 elif [ "$1" = "start-worker" ] ; then
   php artisan storage:mkdirs
-  php -d memory_limit=-1 artisan queue:work --max-time=3600
+  php -d memory_limit=-1 artisan queue:work --max-time=3600 --memory=${WORKER_MEMORY_LIMIT:-256}
 
 # Otherwise, throw an error...
 else

docs/docker.md

@@ -70,6 +70,7 @@ To set up a CDash production instance using docker compose, follow these steps:
   - `SSL_CERTIFICATE_FILE=</path/to/certs/cdash.pem>`
   - `SSL_CERTIFICATE_KEY_FILE=</path/to/certs/cdash.key>`
   - `NUM_WORKERS=<desired number of queue worker replicas, defaults to 1>`
+  - `WORKER_MEMORY_LIMIT`: restart worker after parsing a job if it consumed more than this amount of memory (in MB). Default: 256.
 * For postgres only, edit `docker/docker-compose.postgres.yml` and uncomment the `worker` section.
 * Run this command to start your CDash containers:
 ```bash