fixed SSE Connection error and Rust error when compiling (last brace in /src/markdown.rs)

also updated the markdown post that you see upon entering.

markdown_backend/src/markdown.rs

@@ -673,8 +673,4 @@ pub fn checkhealth() -> HealthReport {
         cache_stats_count,
         errors,
     }
-} 
-        cache_stats_count,
-        errors,
-    }
-} 
+}