add headers

website/pages/docs/from-1.5/blocks/build/index.mdx

@@ -1,8 +1,6 @@
 ---
 description: >
-  Something
-
-  Something
+  The source block defines what builders are started.
 layout: docs
 page_title: build - Blocks
 sidebar_title: <tt>build</tt>

website/pages/docs/from-1.5/blocks/build/post-processor.mdx

@@ -1,8 +1,6 @@
 ---
 description: >
-  Something
-
-  Something
+  The post-processor block defines how a post-processor is configured.
 layout: docs
 page_title: post-processor - build - Blocks
 sidebar_title: <tt>post-processor</tt>

website/pages/docs/from-1.5/blocks/build/provisioner.mdx

@@ -1,8 +1,6 @@
 ---
 description: >
-  Something
-
-  Something
+  The provisioner block defines how a provisioner is configured.
 layout: docs
 page_title: provisioner - build - Blocks
 sidebar_title: <tt>provisioner</tt>

website/pages/docs/from-1.5/blocks/build/source.mdx

@@ -1,8 +1,7 @@
 ---
 description: >
-  Something
-
-  Something
+  A source block nested in a build block allows to use an already defined
+  source and to set specific fields.
 layout: docs
 page_title: source - build - Blocks
 sidebar_title: <tt>source</tt>

website/pages/docs/from-1.5/blocks/locals.mdx

@@ -1,8 +1,7 @@
 ---
 description: >
-  Something
-
-  Something
+  The locals block also called the local-variable block defines locals within
+  your Packer configuration. 
 layout: docs
 page_title: locals - Blocks
 sidebar_title: <tt>locals</tt>

website/pages/docs/from-1.5/blocks/source.mdx

@@ -1,8 +1,6 @@
 ---
 description: >
-  Something
-
-  Something
+  The top-level source block defines reusable builders configuration blocks
 layout: docs
 page_title: source - Blocks
 sidebar_title: <tt>source</tt>

website/pages/docs/from-1.5/blocks/variable.mdx

@@ -1,8 +1,7 @@
 ---
 description: >
-  Something
-
-  Something
+  The `variable` block also called the input-variable block defines variables
+  within your Packer configuration.
 layout: docs
 page_title: variable - Blocks
 sidebar_title: <tt>variable</tt>