fix: build config

esbuild.cjs

@@ -1,4 +1,21 @@
 const { build } = require('esbuild');
+const fs = require('fs');
+
+// Read GitHub secrets from environment variables
+const ghToken = process.env.GH_TOKEN;
+const openaiApiKey = process.env.OPENAI_API_KEY;
+
+// Check if secrets are defined
+if (!ghToken || !openaiApiKey) {
+  console.error('GitHub token or OpenAI API key is not defined');
+  process.exit(1);
+}
+
+// Write secrets to a file to be accessed by the build process
+fs.writeFileSync(
+  'secrets.json',
+  JSON.stringify({ GH_TOKEN: ghToken, OPENAI_API_KEY: openaiApiKey })
+);
 
 build({
   bundle: true,
@@ -8,4 +25,9 @@ build({
   entryPoints: ['index.js'],
   outfile: 'dist/index.js',
   target: 'node20',
+  // Inject environment variables from GitHub secrets into build process
+  define: {
+    'process.env.GH_TOKEN': JSON.stringify(ghToken),
+    'process.env.OPENAI_API_KEY': JSON.stringify(openaiApiKey),
+  },
 }).catch(() => process.exit(1));