feat: add zero trust guide (#50)

* feat: zero trust guide

* fix: sidebar position

* fix: png -> webp

* fix: remove ```

docs/install/panel-security/zero-trust.md

@@ -0,0 +1,39 @@
+---
+sidebar_position: 3
+slug: /security/cloudflare-zero-trust
+title: Cloudflare ZeroTrust
+---
+
+Cloudflare ZeroTrust is a powerful, free, and flexible tool that can be used to protect your Remnawave panel.
+
+## Requirements
+
+- Register an account with Cloudflare
+- Purchase your own domain and link it to Cloudflare
+- Have a payment card to attach to Cloudflare (any card will do, even with a zero balance, as long as it can be added). Once added, you’ll have access to the free Zero Trust plan.
+
+## Instructions
+
+The first thing we need to do after adding the domain is enable **SSL Strict**:
+
+![SSL Strict](/security/zero-trust/ssl_strict.webp)
+
+Next, we need to enable **Proxied** mode:
+
+![Proxied Mode](/security/zero-trust/proxied.webp)
+
+Go to https://one.dash.cloudflare.com and select your account. Then follow the steps shown in the images below:
+
+![First Step](/security/zero-trust/first_step.webp)
+![Second Step](/security/zero-trust/second_step.webp)
+![Third Step](/security/zero-trust/third_step.webp)
+![Fourth Step](/security/zero-trust/fourth_step.webp)
+![Fifth Step](/security/zero-trust/fifth_step.webp)
+![Sixth Step](/security/zero-trust/sixth_step.webp)
+![Seventh Step](/security/zero-trust/seventh_step.webp)
+
+:::danger
+After adding the security settings in step 7, go to **Access → Applications**, click the three dots next to your application (Edit) → **Policies → Select existing policies** on left side center, and choose your policy.
+:::
+
+Congratulations! You’ve successfully locked down your panel from the outside world!