add meatdata;change for crossref

main.md

@@ -1,14 +1,16 @@
+---
+title: Markdown Test
+subtitle: "Playing with markdown and pandoc"
+author:
+  - Frank Adämmer
+
+sectionsDepth: -1
+numbersections: true
+description: ""
+---
 # Markdown Test {#sec:markdown}
 
-This is a test with an image. See Figure {@fig:picard} in section {@sec:image}.
-
---------------------------------------------------
-                    mpg   cyl   disp   hp   drat
-------------------- ----- ----- ------ ---- ------
-          Mazda RX4 21    6     160    110  3.9
-
-      Mazda RX4 Wag 21    6     160    110  3.9
---------------------------------------------------
+This is a test with an image. See [figure @fig:picard] in [section @sec:image].
 
 ## Subsection {#sec:image}