Fix broken links in website footer (#9613)

* add security page and press kit

* github link correction

website/components/subnav/index.jsx

@@ -14,7 +14,7 @@ export default function ProductSubnav() {
       ctaLinks={[
         {
           text: 'GitHub',
-          url: 'https://www.github.com/hashicorp/vault',
+          url: 'https://github.com/hashicorp/vault',
         },
         {
           text: 'Download',

website/layouts/index.jsx

@@ -0,0 +1,35 @@
+import DocsPage from '@hashicorp/react-docs-page'
+import Head from 'next/head'
+import Link from 'next/link'
+
+function DefaultLayoutWrapper(pageMeta) {
+  function DefaultLayout(props) {
+    return (
+      <DocsPage
+        {...props}
+        product="vault"
+        head={{
+          is: Head,
+          title: `${pageMeta.page_title} | Vault by HashiCorp`,
+          description: pageMeta.description,
+          siteName: 'Vault by HashiCorp',
+        }}
+        sidenav={{
+          Link,
+          category: 'docs',
+          currentPage: props.path,
+          data: [],
+          order: [],
+          disableFilter: true,
+        }}
+        resourceURL={`https://github.com/hashicorp/vault/blob/master/website/pages/${pageMeta.__resourcePath}`}
+      />
+    )
+  }
+
+  DefaultLayout.getInitialProps = ({ asPath }) => ({ path: asPath })
+
+  return DefaultLayout
+}
+
+export default DefaultLayoutWrapper

website/pages/security/index.mdx

@@ -0,0 +1,23 @@
+---
+layout: index
+page_title: Security
+description: >-
+  Vault takes security very seriously. Please responsibly disclose any
+  security vulnerabilities found and we'll handle it quickly.
+---
+
+# Security
+
+We understand that many users place a high level of trust in HashiCorp and
+the tools we build. We apply best practices and focus on security to make
+sure we can maintain the trust of the community.
+
+We deeply appreciate any effort to disclose vulnerabilities responsibly.
+
+If you would like to report a vulnerability, please see the
+[HashiCorp security page](https://www.hashicorp.com/security),
+which has the proper email to communicate with as well as our PGP key.
+
+If you aren't reporting a security sensitive vulnerability, please
+open an issue on the standard [GitHub](https://github.com/hashicorp/vault)
+repository.