Merge pull request rails#51084 from anonychun/dont-override-ld-preload

Dont override LD_PRELOAD value

Author: rafaelfranca

railties/lib/rails/generators/rails/app/templates/docker-entrypoint.tt

@@ -1,8 +1,8 @@
 #!/bin/bash -e
 
 # Enable jemalloc for reduced memory usage and latency.
-if [ -f /usr/lib/*/libjemalloc.so.2 ]; then
-  export LD_PRELOAD="$(echo /usr/lib/*/libjemalloc.so.2) $LD_PRELOAD"
+if [ -z "${LD_PRELOAD+x}" ] && [ -f /usr/lib/*/libjemalloc.so.2 ]; then
+  export LD_PRELOAD="$(echo /usr/lib/*/libjemalloc.so.2)"
 fi
 
 <% unless skip_active_record? -%>