diff --git a/package-lock.json b/package-lock.json
index ae94b6a..f49cebd 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -4028,6 +4028,7 @@
     "packages/db": {
       "name": "@embalse-info/db",
       "version": "0.0.1",
+      "hasInstallScript": true,
       "dependencies": {
         "mongodb": "^6.19.0"
       },
diff --git a/packages/db/.env.example b/packages/db/.env.example
new file mode 100644
index 0000000..9ea830f
--- /dev/null
+++ b/packages/db/.env.example
@@ -0,0 +1 @@
+MONGODB_CONNECTION_STRING: mongodb://localhost:27017/embalse-info
diff --git a/packages/db/package.json b/packages/db/package.json
index d9ff5a8..5cd70a0 100644
--- a/packages/db/package.json
+++ b/packages/db/package.json
@@ -12,6 +12,7 @@
   "main": "./dist/index.js",
   "types": "./dist/index.d.ts",
   "scripts": {
+    "postinstall": "node setup.js",
     "build": "run-p clean type-check build:db",
     "build:db": "tsc",
     "clean": "rimraf dist",
diff --git a/packages/db/setup.js b/packages/db/setup.js
new file mode 100644
index 0000000..fb3505c
--- /dev/null
+++ b/packages/db/setup.js
@@ -0,0 +1,26 @@
+import fs from "fs";
+import path from "path";
+import { fileURLToPath } from "url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+const mongoDataPath = path.resolve(__dirname, "mongo-data");
+const envExamplePath = path.resolve(__dirname, ".env.example");
+const envPath = path.resolve(__dirname, ".env");
+
+try {
+  // Create directory mongo-data
+  if (!fs.existsSync(mongoDataPath)) {
+    fs.mkdirSync(mongoDataPath, { recursive: true });
+  }
+
+  // Copy .env.example a .env
+  if (!fs.existsSync(envPath)) {
+    if (fs.existsSync(envExamplePath)) {
+      fs.copyFileSync(envExamplePath, envPath);
+    }
+  }
+} catch (error) {
+  process.exit(1);
+}