GA: Add Google Analytics snippets

Signed-off-by: Youngsoo Shin <sysx114@gmail.com>

Writerside/cfg/buildprofiles.xml

@@ -6,6 +6,8 @@
     <variables>
         <search-endpoint>https://search.sys114.com</search-endpoint>
         <web-root>https://docs.sys114.com</web-root>
+        <analytics-head-script-file>google.head.html</analytics-head-script-file>
+        <analytics-body-html-file>google.body.html</analytics-body-html-file>
     </variables>
     <build-profile instance="d">
         <variables>

Writerside/cfg/google.head.html

@@ -0,0 +1,9 @@
+<!-- Google tag (gtag.js) -->
+<script async src="https://www.googletagmanager.com/gtag/js?id=G-8BTPRBKJ5B"></script>
+<script>
+    window.dataLayer = window.dataLayer || [];
+    function gtag(){dataLayer.push(arguments);}
+    gtag('js', new Date());
+
+    gtag('config', 'G-8BTPRBKJ5B');
+</script>->

Writerside/d.tree

@@ -15,6 +15,7 @@
     <toc-element toc-title="U-Boot">
     </toc-element>
     <toc-element toc-title="Odroid">
+        <toc-element topic="Change-kernel-version.md"/>
     </toc-element>
     <toc-element toc-title="About">
     </toc-element>

Writerside/topics/Change-kernel-version.md

@@ -0,0 +1,29 @@
+# Change kernel version
+
+Some features may be limited depending on the kernel version.
+Need to change the kernel version, use the method below.
+
+## Install kernel from package server
+
+Below is an example of changing to kernel version 5.9.0.
+
+```Bash
+sudo apt update
+sudo apt install linux-image-5.9.0-odroid-arm64
+sudo flash-kernel --force 5.9.0-odroid-arm64
+```
+
+
+## View installed kernel list
+Use `linux-version` command, you can see list of installed kernel list.
+```Bash
+linux-version list
+5.9.0-odroid-arm64
+5.9.15-odroid-arm64
+```
+
+## Change kernel
+Use `flask-kernel`.
+```Bash
+sudo flash-kernel --force 5.9.0-odroid-arm64
+```