esbuild instead of tsc

Dockerfile

@@ -14,6 +14,7 @@ FROM deps AS builder
 WORKDIR /app
 
 COPY tsconfig.json ./
+COPY build.js ./
 COPY src ./src
 
 RUN pnpm build

build.js

@@ -0,0 +1,13 @@
+// build.js
+import { build } from 'esbuild';
+
+build({
+  entryPoints: ['src/index.ts'],
+  bundle: true,
+  platform: 'node',
+  target: 'node22',
+  format: 'esm',
+  outfile: 'dist/index.js',
+  sourcemap: true,
+  packages: 'external',
+}).catch(() => process.exit(1));

package.json

@@ -4,11 +4,11 @@
   "description": "",
   "main": "dist/index.js",
   "scripts": {
-    "build": "tsc",
     "dev": "tsx watch src/index.ts",
     "start": "node dist/index.js",
     "lint": "eslint .",
-    "typecheck": "tsc --noEmit",
+    "typecheck": "tsc",
+    "build": "tsc && node build.js",
     "test": "echo \"Error: no test specified\" && exit 1"
   },
   "keywords": [],
@@ -27,6 +27,7 @@
   "devDependencies": {
     "@eslint/js": "^9.21.0",
     "@types/node": "^22.13.5",
+    "esbuild": "^0.28.1",
     "eslint": "^9.21.0",
     "pino-pretty": "^13.1.3",
     "tsx": "^4.19.3",

pnpm-lock.yaml

@@ -226,6 +226,9 @@ importers:
       '@types/node':
         specifier: ^22.13.5
         version: 22.20.0
+      esbuild:
+        specifier: ^0.28.1
+        version: 0.28.1
       eslint:
         specifier: ^9.21.0
         version: 9.39.4

src/server.ts

@@ -1,7 +1,7 @@
 import Fastify, { type FastifyInstance } from "fastify";
 import { ToolDef } from "./types";
 import McpSession from "./mcpConnection";
-import { isInitializeRequest } from "@modelcontextprotocol/sdk/types";
+import { isInitializeRequest } from "@modelcontextprotocol/sdk/types.js";
 import { pingTool, testAddTool, testRemoveTool, listToolsTool, invokeToolTool } from "./mcpTools";
 
 export class Server {

tsconfig.json

@@ -6,6 +6,7 @@
     "lib": ["ES2022"],
     "outDir": "dist",
     "rootDir": "src",
+    "noEmit": true,
     "strict": true,
     "esModuleInterop": true,
     "skipLibCheck": true,