AVOID_PROJECTS is not set by default

Author: Vladimir Kotal

docker/README.md

@@ -80,7 +80,7 @@ The volume mounted to `/opengrok/src` should contain the projects you want to ma
 `NOMIRROR` | empty | To avoid the mirroring step, set the variable to non-empty value.
 `URL_ROOT` | `/` | Override the sub-URL that OpenGrok should run on.
 `WORKERS` | number of CPUs in the container | number of workers to use for syncing (applies only to setup with projects enabled)
-`AVOID_PROJECTS` | False | run in project less configuration. Set to non empty value disables projects.
+`AVOID_PROJECTS` | empty | run in project less configuration. Set to non empty value disables projects.
 
 To specify environment variable for `docker run`, use the `-e` option, e.g. `-e SYNC_PERIOD_MINUTES=30`