add introduction doc to runtime configuration

docs/runtime-config.md

@@ -0,0 +1,52 @@
+---
+title: "Getting Started"
+description: Detailed guide on the runtime configuration for Tailcall.
+slug: runtime-configuration
+---
+
+The runtime configuration in Tailcall is designed to handle all runtime-related settings, such as server settings, upstream configurations, telemetry, and links to other resources. This configuration is written exclusively in `.json` or `.yml` format.
+
+## Introduction
+
+The runtime configuration separates runtime concerns from schema definitions, simplifying the management and merging of configurations. This approach ensures a clear distinction between runtime settings and schema definitions, making the configuration process more predictable and easier to manage.
+
+## Configuration Structure
+
+A typical runtime configuration file includes settings for the server, upstream services, telemetry, and links to other resources. Below is an example of a runtime configuration in YAML format:
+
+```yaml title="main.yaml" showLineNumbers
+server:
+  port: 8000
+
+upstream:
+  batch:
+    maxSize: 1000
+
+telemetry:
+  export:
+    stdout:
+      pretty: true
+
+links:
+  - src: "./users.graphql"
+  - src: "./products.graphql"
+```
+
+## Example Usage
+
+To start the Tailcall server with the runtime configuration, use the following command:
+
+```sh
+tailcall start ./main.yaml
+```
+
+This command will start the server using the settings defined in main.yml.
+
+## Configuration Options
+
+| Option                               | Description                                                                   |
+| ------------------------------------ | ----------------------------------------------------------------------------- |
+| [`server`](./config/server.md)       | Configuration settings for the Tailcall server, including port and host.      |
+| [`upstream`](./config/upstream.md)   | Settings for upstream services, such as batching and timeouts.                |
+| [`telemetry`](./config/telemetry.md) | Configuration for telemetry export options, including format and endpoints.   |
+| [`links`](./config/links.md)         | Links to other resources or schema files to be included in the configuration. |

sidebars.ts

@@ -22,9 +22,9 @@ const sidebars: SidebarsConfig = {
     },
     {
       type: "category",
-      label: "Config",
+      label: "Runtime configuration",
       collapsed: false,
-      items: ["config/links", "config/server", "config/telemetry", "config/upstream"].sort(),
+      items: ["runtime-config", "config/links", "config/server", "config/telemetry", "config/upstream"],
     },
     {
       type: "category",