add headers to lk

data/sql/postgresql.md

@@ -1,3 +1,7 @@
+---
+title: "postgresql"
+tags: [ "Documentation", "data" ]
+---
 # Setup
 
 Install postgres and start it as a service, then start with:

data/sql/sql.md

@@ -1,3 +1,7 @@
+---
+title: "sql"
+tags: [ "Documentation", "data" ]
+---
 MySQL, Aurora and the Maria Database work similarly, and mostly with the same commands.
 
 MySQL requires 160 Megs of disk space.

data/sql/tricks.md

@@ -1,3 +1,7 @@
+---
+title: "tricks"
+tags: [ "Documentation", "data" ]
+---
 
 # Find data from any table