Add abstract

docs/abstract.md

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+---
+id: abstract
+title: Abstract
+sidebar_label: Introduction
+---
+
+For a system administrator, having to perform security vulnerability analysis and software update on a daily basis can be a burden.
+To avoid downtime in production environment, it is common for system administrator to choose not to use the automatic update option provided by package manager and to perform update manually.
+This leads to the following problems.
+- System administrator will have to constantly watch out for any new vulnerabilities in NVD(National Vulnerability Database) or similar databases.
+- It might be impossible for the system administrator to monitor all the software if there are a large number of software installed in server.
+- It is expensive to perform analysis to determine the servers affected by new vulnerabilities. The possibility of overlooking a server or two during analysis is there.
+
+
+Vuls is a tool created to solve the problems listed above. It has the following characteristics.
+- Informs users of the vulnerabilities that are related to the system.
+- Informs users of the servers that are affected.
+- Vulnerability detection is done automatically to prevent any oversight.
+- Report is generated on regular basis using CRON or other methods. to manage vulnerability.
+
+![Vuls-Motivation](/img/vuls-motivation.png)
+

website/i18n/en.json

@@ -4,6 +4,8 @@
     "next": "Next",
     "previous": "Previous",
     "tagline": "Vulnerability scanner for Linux/FreeBSD, agentless, written in Go",
+    "abstract": "Abstract",
+    "Introduction": "Introduction",
     "doc1": "Latin-ish",
     "Example Page": "Example Page",
     "doc2": "document number 2",

website/sidebars.json

@@ -1,5 +1,6 @@
 {
   "docs": {
+    "Introduction": ["abstract", "tutorial-localscan"],
     "Tutorial": ["tutorial", "tutorial-localscan"],
     "Docusaurus": ["doc1"],
     "First Category": ["doc2"],