fix.patch

diff --git a/index.ts b/index.ts
index ae8d651..02b352a 100644
--- a/index.ts
+++ b/index.ts
@@ -1,5 +1,5 @@
-if (process.env.NODE_ENV === 'production') {
-  require('./dist')
+if (process.env.NODE_ENV === "production") {
+  require("./dist");
 } else {
-  require('nodemon')({script: 'dev.js'})
+  require("nodemon")({ script: "./dist/dev.js" });
 }
diff --git a/package.json b/package.json
index 496ad82..50bfa7f 100644
--- a/package.json
+++ b/package.json
@@ -2,9 +2,9 @@
   "name": "express-app-example",
   "version": "1.0.0",
   "description": "An example of how to structure medium-to-large sized Express apps",
-  "main": "index.js",
+  "main": "./dist/index.js",
   "engines": {
-    "node": "14.5.0"
+    "node": "14.4.0"
   },
   "dependencies": {
     "express": "^4.17.1",
diff --git a/src/routes/math.ts b/src/routes/math.ts
index 82ea60b..8cbb996 100644
--- a/src/routes/math.ts
+++ b/src/routes/math.ts
@@ -15,7 +15,7 @@ type MathQuery = {
 
 async function add(req: any, res: any) {
   const mathQuery = req.query as MathQuery;
-  const sum = mathQuery.a + mathQuery.c;
+  const sum = Number(mathQuery.a) + Number(mathQuery.c);
   res.send(sum.toString());
 }