Add environment configuration and update README instructions

.env.example

@@ -0,0 +1 @@
+MISTRAL_API_KEY="YOUR_MISTRAL_API_KEY"

.gitignore

@@ -1,4 +1,4 @@
 node_modules/
 build/
 *.log
-.env*
+.env

README.md

@@ -15,6 +15,19 @@ This repository is part of a blog post by Speakeasy: [Building a Mistral MCP Ser
 
 To interact with the Mistral AI platform, you'll need an API key. You can get one by signing up at [mistral.ai](https://mistral.ai/).
 
+Set your API key as an environment variable. Create a copy of `.env.example` and rename it to `.env`.
+
+```bash
+cp .env.example .env
+open .env
+```
+
+Then update the `.env` file with your API key:
+
+```bash
+MISTRAL_API_KEY="YOUR_MISTRAL_API_KEY"
+```
+
 ## Tools
 
 This server provides two tools:

src/index.ts

@@ -1,5 +1,5 @@
 #!/usr/bin/env node
-
+import path from "path";
 import { Server } from "@modelcontextprotocol/sdk/server/index.js";
 import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
 import {
@@ -18,7 +18,7 @@ import {
 } from "./schema.js";
 
 import dotenv from "dotenv";
-dotenv.config();
+dotenv.config({path: path.join(import.meta.dirname, "..", ".env")});
 
 const server = new Server(
   {