diff --git a/Readme.md b/Readme.md
new file mode 100644
index 0000000..206fe1a
--- /dev/null
+++ b/Readme.md
@@ -0,0 +1,107 @@
+# Weather app Back-end
+***
+Back-end of [Weather app Front-end](https://github.com/Web-Rats/FrontEnd). Contains method for database(mongo) operations, validation of user and weather operations.
+
+## Install and run localy
+1. Clone ``https://github.com/Web-Rats/BackEnd.git``.
+2. Install dependencies using ``npm install``.
+3. Create an ``.env`` file in root directoty (insert your credential for accessing database), with ``USER="yourUser"`` and ``PSWD="yourPassword"``
+4. Start with ``node index.js`` or for develop mode ``npm run api``.
+
+## How it works?
+<details>
+<summary>DB functions</summary>
+
+<details>
+<summary>User</summary>
+
+```bash
+├───dbApi
+    │
+    └───Methods
+        │
+        └───User
+            ├─delete.js
+            ├─find.js
+            ├─register.js
+            └─update.js
+```
+
+### Register user
+```javascript
+async function registerUser(object)
+```
+Take as parameter the object user and save it in database.
+
+### Delete user
+```javascript
+async function deleteUser(email)
+```
+Take as parameter the email of the user for deleting user from database.
+
+### Find User
+```javascript
+async function findUser(email)
+```
+Take as parameter the email of the user for finding it in the database.
+When it finds the user it will return the object 'user'. 
+
+### Update user
+```javascript
+async function updateUser(update, email)
+```
+Take as parameters an object 'update', that contains the key to update, and the email for finding the user.
+When the update is succeful it returns the update object 'user'. 
+
+</details>
+<details>
+<summary>Weather</summary>
+
+```bash
+├───dbApi
+    │
+    └───Methods
+        │
+        └───Prevision
+            ├───addDaily.js
+            ├───addHourly.js
+            ├───addPrevisions.js
+            └───findWeather.js
+```
+
+### Add previnsions
+```javascript
+async function addPrevisions(cityName, countryCode, stateCode, object)
+```
+
+### Find weather
+```javascript
+async function findWeather(cityName, countryCode, stateCode, endD = undefined, startD = undefined)
+```
+
+</details>
+
+
+</details>
+
+## Run with docker
+Remove in the Dockerfile the '#' before ENV, then insert your creditial for the database connection:
+```text
+#remove '#'
+ENV USER yourUser
+ENV PSWD yourPassword
+``` 
+
+After that, in the root directory, create the image with the command:
+```bash
+docker build -t nameImage:latest 
+```
+
+In the end run the image with the command:
+```bash
+docker run --name containerName nameImage:latest 
+```
+If you want to run it detatch:
+```bash
+docker run -d --name containerName nameImage:latest 
+```
diff --git a/WeatherApi/position.js b/WeatherApi/position.js
index 44d7579..f328f86 100644
--- a/WeatherApi/position.js
+++ b/WeatherApi/position.js
@@ -28,7 +28,7 @@ async function getPosition(location, contryCode = undefined, stateCode = undefin
 
 
   let filtered = { "results": [] }
-  result["results"].forEach(element => {
+  result["results"]?.forEach(element => {
     if (element["name"] == location && element["country_code"] == contryCode && element["admin1"]?.toUpperCase() == stateCode) {
       filtered["results"].push(element)
     }
diff --git a/index.js b/index.js
index faa009b..076a49d 100644
--- a/index.js
+++ b/index.js
@@ -4,7 +4,7 @@ const express = require('express')
 const cors = require('cors');
 
 
-//definisco la porta per l'API
+//definisco la Porta per l'API
 const port = 3000
 
 //definisco le variabili per express