SOLR-16323: Change USER to use ID instead of Name (#9)

Also remove vestiges of old-solr-versions
diff --git a/.github/workflows/pr-for-official-repo.yml b/.github/workflows/pr-for-official-repo.yml
index 5770cb7..f78deba 100644
--- a/.github/workflows/pr-for-official-repo.yml
+++ b/.github/workflows/pr-for-official-repo.yml
@@ -5,9 +5,8 @@
     branches:
       - 'main'
     paths:
-      - 'old-solr-versions'
       - 'generate-stackbrew-library.sh'
-      - '[0-9]+.[0-9]+/**'
+      - '[0-9]+.[0-9]+(-slim)?/**'
 
 jobs:
   test:
diff --git a/8.11-slim/Dockerfile b/8.11-slim/Dockerfile
index 76f913d..2e22845 100644
--- a/8.11-slim/Dockerfile
+++ b/8.11-slim/Dockerfile
@@ -118,7 +118,7 @@
 VOLUME /var/solr
 EXPOSE 8983
 WORKDIR /opt/solr
-USER $SOLR_USER
+USER $SOLR_UID
 
 ENTRYPOINT ["docker-entrypoint.sh"]
 CMD ["solr-foreground"]
diff --git a/8.11/Dockerfile b/8.11/Dockerfile
index a9e1a3e..a2e328c 100644
--- a/8.11/Dockerfile
+++ b/8.11/Dockerfile
@@ -118,7 +118,7 @@
 VOLUME /var/solr
 EXPOSE 8983
 WORKDIR /opt/solr
-USER $SOLR_USER
+USER $SOLR_UID
 
 ENTRYPOINT ["docker-entrypoint.sh"]
 CMD ["solr-foreground"]
diff --git a/old-solr-versions b/old-solr-versions
deleted file mode 100644
index a03de3b..0000000
--- a/old-solr-versions
+++ /dev/null
@@ -1,14 +0,0 @@
-
-Tags: 8.11.2, 8.11, 8
-Architectures: amd64, arm64v8
-GitRepo: https://github.com/docker-solr/docker-solr.git
-GitFetch: refs/heads/master
-GitCommit: 970bb718583d14f6f1300f6fd261f01ddcf757c8
-Directory: 8.11
-
-Tags: 8.11.2-slim, 8.11-slim, 8-slim
-Architectures: amd64, arm64v8
-GitRepo: https://github.com/docker-solr/docker-solr.git
-GitFetch: refs/heads/master
-GitCommit: 970bb718583d14f6f1300f6fd261f01ddcf757c8
-Directory: 8.11/slim