feat: add --host and --port CLI arguments to hapi server command. fix #37

Add configurable host binding for the Mini App HTTP server through:
- New `webappHost` configuration (defaults to 127.0.0.1 for security)
- CLI arguments `--host` and `--port` with flexible parsing (--host=value or --host value)
- Priority order: CLI args > env vars > settings.json > defaults
- Updated Bun.serve() to bind to the configured hostname

Modified:
- server/src/config/settings.ts
- server/src/config/serverSettings.ts
- server/src/configuration.ts
- server/src/web/server.ts
- server/src/index.ts
- cli/src/commands/server.ts

cli/src/commands/server.ts

@@ -1,11 +1,39 @@
 import chalk from 'chalk'
-import type { CommandDefinition } from './types'
+import type { CommandDefinition, CommandContext } from './types'
+
+function parseServerArgs(args: string[]): { host?: string; port?: string } {
+    const result: { host?: string; port?: string } = {}
+
+    for (let i = 0; i < args.length; i++) {
+        const arg = args[i]
+        if (arg === '--host' && i + 1 < args.length) {
+            result.host = args[++i]
+        } else if (arg === '--port' && i + 1 < args.length) {
+            result.port = args[++i]
+        } else if (arg.startsWith('--host=')) {
+            result.host = arg.slice('--host='.length)
+        } else if (arg.startsWith('--port=')) {
+            result.port = arg.slice('--port='.length)
+        }
+    }
+
+    return result
+}
 
 export const serverCommand: CommandDefinition = {
     name: 'server',
     requiresRuntimeAssets: false,
-    run: async () => {
+    run: async (context: CommandContext) => {
         try {
+            const { host, port } = parseServerArgs(context.commandArgs)
+
+            if (host) {
+                process.env.WEBAPP_HOST = host
+            }
+            if (port) {
+                process.env.WEBAPP_PORT = port
+            }
+
             await import('../../../server/src/index')
         } catch (error) {
             console.error(chalk.red('Error:'), error instanceof Error ? error.message : 'Unknown error')