diff --git a/assets/thumbnail.pdf b/assets/thumbnail.pdf
new file mode 100644
index 0000000..5fcb36e
Binary files /dev/null and b/assets/thumbnail.pdf differ
diff --git a/assets/thumbnail.png b/assets/thumbnail.png
new file mode 100644
index 0000000..bbb3997
Binary files /dev/null and b/assets/thumbnail.png differ