Rebase to 3.21, support non-root operation

root/etc/s6-overlay/s6-rc.d/init-prowlarr-config/run

@@ -3,7 +3,8 @@
 
 mkdir -p /run/prowlarr-temp
 
-# permissions
-lsiown -R abc:abc \
-    /config \
-    /run/prowlarr-temp
+if [[ -z ${LSIO_NON_ROOT_USER} ]]; then
+    lsiown -R abc:abc \
+        /config \
+        /run/prowlarr-temp
+fi

root/etc/s6-overlay/s6-rc.d/svc-prowlarr/run

@@ -1,7 +1,14 @@
 #!/usr/bin/with-contenv bash
 # shellcheck shell=bash
 
-exec \
-    s6-notifyoncheck -d -n 300 -w 1000 \
-        cd /app/prowlarr/bin s6-setuidgid abc /app/prowlarr/bin/Prowlarr \
-        -nobrowser -data=/config
+if [[ -n ${LSIO_NON_ROOT_USER} ]]; then
+    exec \
+        s6-notifyoncheck -d -n 300 -w 1000 \
+            cd /app/prowlarr/bin /app/prowlarr/bin/Prowlarr \
+            -nobrowser -data=/config
+else
+    exec \
+        s6-notifyoncheck -d -n 300 -w 1000 \
+            cd /app/prowlarr/bin s6-setuidgid abc /app/prowlarr/bin/Prowlarr \
+            -nobrowser -data=/config
+fi