chore: more docs cleanup/unification

docs/install/index.md

@@ -1,4 +1,4 @@
----
+--
 title: Installation
 description: Get started with Headplane.
 ---
@@ -20,3 +20,31 @@ is available to use as a starting point. Some of the important fields include:
 | **`headscale.url`** | Point to your Headscale server (e.g., `http://headscale.example.com` or `http://headscale:8080` in Docker). |
 | **`server.cookie_secret`** | Used to encrypt cookies. You can generate a random string using a command like `openssl rand -base64 32`. |
 | **`server.data_path`** | Just a path to keep in mind, especially if you're using Docker. |
+
+The configuration file is rather complicated and has many more options. Refer to
+the [Configuration](../configuration.md) guide for a detailed explanation of all
+the available options, as well as guidance on securely setting up your values
+through secret path options and environment variables.
+
+## Deployment Methods
+Headplane can be deployed in several different ways, each with its own set of
+advantages and trade-offs. Choose the method that best fits your needs:
+
+### [Docker](./docker.md): Fast and easy deployment using Docker
+  - Recommended for most users due to its simplicity and ease of use.
+  - Allows for advanced features like network management and remote web SSH.
+  - Requires Docker and Docker Compose to be installed.
+
+---
+
+### [Native Mode](./native-mode.md): Direct installation on a server
+  - Suitable for users who prefer not to use Docker.
+  - Allows for advanced features like network management and remote web SSH.
+  - Requires manual setup of dependencies and environment.
+
+---
+
+### [Limited Mode](./limited-mode.md): Quick and easy deployment with minimal features
+  - Ideal for testing or simple environments and not intended for production use.
+  - Lacks any advanced functionality or integrations such as network management
+  or remote web SSH.