Rename mcp.json to server.json (#106)

<!-- Provide a brief summary of your changes -->
Rename mcp.json to server.json
## Motivation and Context
<!-- Why is this change needed? What problem does it solve? -->

## How Has This Been Tested?
<!-- Have you tested this in a real application? Which scenarios were
tested? -->

## Breaking Changes
<!-- Will users need to update their code or configurations? -->

## Types of changes
<!-- What types of changes does your code introduce? Put an `x` in all
the boxes that apply: -->
- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to change)
- [ ] Documentation update

## Checklist
<!-- Go over all the following points, and put an `x` in all the boxes
that apply. -->
- [ ] I have read the [MCP
Documentation](https://modelcontextprotocol.io)
- [ ] My code follows the repository's style guidelines
- [ ] New and existing tests pass locally
- [ ] I have added appropriate error handling
- [ ] I have added or updated documentation as needed

## Additional context
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Related to #86

Co-authored-by: Avinash Sridhar <sridharavinash@users.noreply.github.com>

tools/publisher/README.md

@@ -47,7 +47,7 @@ The tool has been simplified to use **GitHub OAuth device flow authentication ex
 
 ## Example
 
-1. Prepare your `mcp.json` file with your server details:
+1. Prepare your `server.json` file with your server details:
 
 ```json
 {
@@ -90,7 +90,7 @@ The tool has been simplified to use **GitHub OAuth device flow authentication ex
 2. Run the publisher tool:
 
 ```bash
-./bin/mcp-publisher --registry-url "https://mcp-registry.example.com" --mcp-file "./mcp.json"
+./bin/mcp-publisher --registry-url "https://mcp-registry.example.com" --mcp-file "./server.json"
 ```
 
 3. Follow the authentication instructions in the terminal if prompted.
@@ -103,5 +103,5 @@ The tool has been simplified to use **GitHub OAuth device flow authentication ex
 - **Automatic Client ID**: The GitHub Client ID is automatically retrieved from the registry's health endpoint
 - **Token Storage**: The authentication token is saved in `.mcpregistry_token` in the current directory
 - **Internet Required**: Active internet connection needed for GitHub authentication and registry communication
-- **Repository Access**: Ensure the repository and package mentioned in your `mcp.json` file exist and are accessible
+- **Repository Access**: Ensure the repository and package mentioned in your `server.json` file exist and are accessible
 - **OAuth Permissions**: You may need to grant the OAuth app access to your GitHub organizations if publishing org repositories

tools/publisher/main.go

@@ -85,7 +85,7 @@ func publishToRegistry(registryURL string, mcpData []byte, token string) error {
 	var mcpDetails map[string]interface{}
 	err := json.Unmarshal(mcpData, &mcpDetails)
 	if err != nil {
-		return fmt.Errorf("error parsing mcp.json file: %w", err)
+		return fmt.Errorf("error parsing server.json file: %w", err)
 	}
 
 	// Create the publish request payload (without authentication)

tools/publisher/server.json

@@ -0,0 +1,57 @@
+{
+    "description": "<your description here>",
+    "name": "io.github.<owner>/<server-name>",
+    "packages": [
+        {
+            "registry_name": "npm",
+            "name": "io.github.<owner>/<server-name>",
+            "version": "0.2.23",
+            "package_arguments": [
+                {
+                    "description": "Specify services and permissions.",
+                    "is_required": true,
+                    "format": "string",
+                    "value": "-s",
+                    "default": "-s",
+                    "type": "positional",
+                    "value_hint": "-s"
+                }
+            ],
+            "environment_variables": [
+                {
+                    "description": "API Key to access the server",
+                    "name": "API_KEY"
+                }
+            ]
+        },{
+            "registry_name": "docker>",
+            "name": "io.github.<owner>/<server-name>-cli",
+            "version": "0.123.223",
+            "runtime_hint": "docker",
+            "runtime_arguments": [
+                {
+                    "description": "Specify services and permissions.",
+                    "is_required": true,
+                    "format": "string",
+                    "value": "--mount",
+                    "default": "--mount",
+                    "type": "positional",
+                    "value_hint": "--mount"
+                }
+            ],
+            "environment_variables": [
+                {
+                    "description": "API Key to access the server",
+                    "name": "API_KEY"
+                }
+            ]
+        }
+    ],
+    "repository": {
+        "url": "https://github.com/<owner>/<server-name>",
+        "source": "github"
+    },
+    "version_detail": {
+        "version": "0.0.1-<publisher_version>"
+    }
+}