Use exec in the command line, avoid bash process (#86)

Author: GioF71

README.md

@@ -346,6 +346,7 @@ Just be careful to use the tag you have built.
 
 Change Date|Major Changes
 ---|---
+2024-09-21|Use exec instead of eval
 2024-09-05|Handle non-writable volumes more gracefully
 2024-09-05|Fix user and group management
 2024-03-07|Fix switch for normalisation pregain (see [#81](https://github.com/GioF71/librespot-docker/issues/77))

app/bin/run-librespot.sh

@@ -300,12 +300,12 @@ fi
 if [[ $current_user_id -eq 0 ]]; then
     if [[ "${BACKEND}" == "pulseaudio" || -n "${PUID}" ]]; then
         echo "Running in user mode ..."
-        su - $USER_NAME -c "$CMD_LINE"
+        exec su - $USER_NAME -c "$CMD_LINE"
     else
         echo "Running as root ..."
-        eval $CMD_LINE;
+        eval "exec $CMD_LINE";
     fi
 else
     echo "Running as uid: [$current_user_id] ..."
-    eval $CMD_LINE
+    eval "exec $CMD_LINE"
 fi