Fixes data directory ownership on upgrades

Addresses an issue where upgraded containers retain root ownership of files in the data directory if the previous version ran as root.

This change now checks for root-owned files and changes their ownership to the specified PUID:PGID if the container is not running as root (PUID!=0). This ensures that the user can access and modify their data after upgrading the container.

entrypoint.sh

@@ -50,8 +50,35 @@ fi
 # Ensure data directory exists
 mkdir -p /vintagestory/data
 
-# Only chown if directory is empty (new installation)
-if [ -z "$(ls -A /vintagestory/data 2>/dev/null)" ]; then
+# Handle existing installations
+if [ -n "$(ls -A /vintagestory/data 2>/dev/null)" ]; then
+    # Only fix root-owned files if we're NOT running as root
+    # If user wants to run as root (PUID=0), leave files as-is
+    if [ "$PUID" != "0" ]; then
+        # Check if we've already fixed permissions (marker file exists)
+        MARKER_FILE="/vintagestory/data/.permissions_fixed"
+        
+        if [ ! -f "$MARKER_FILE" ]; then
+            # Check for files owned by root (created by old image version that ran as root)
+            ROOT_FILES=$(find /vintagestory/data -user 0 -print -quit 2>/dev/null)
+            
+            if [ -n "$ROOT_FILES" ]; then
+                echo "🔧 Detected files owned by root (created by previous image version)"
+                echo "   Fixing ownership to $PUID:$PGID..."
+                echo "   This may take a moment..."
+                chown -R "$PUID:$PGID" /vintagestory/data 2>/dev/null || {
+                    echo "   ⚠️  Could not change ownership of some files"
+                    echo "   This should not affect operation if data directory itself is writable"
+                }
+                echo "   ✅ Done!"
+            fi
+            
+            # Create marker file to skip this check on future starts
+            touch "$MARKER_FILE" 2>/dev/null || true
+        fi
+    fi
+else
+    # Empty directory - new installation
     chown "$PUID:$PGID" /vintagestory/data
 fi