Added information on how to get the exchange data for each year.

data/exchange/GETEXCHANGE.md

@@ -1,11 +1,75 @@
-# How to get exchange information for the application.
+# How to get exchange information for the application
 
-For the development of the application I'm using https://apilayer.com/ to get the historical echange data.
+For the development of the application I'm using https://apilayer.com/ to get the historical exchange data.
 
 Here is the request to get the 2023 data.
 
 ```shell
 curl --location 'https://api.apilayer.com/exchangerates_data/timeseries?start_date=2023-01-01&end_date=2023-12-31&base=USD&symbols=EUR' \
 --header 'apikey: XXXXXXXXXXXXXXXXXXXXXXXXXXXX
 ```
+
 > Note that you need to provide your own api key to get the data.
+
+The response for the previews request was:
+
+```json
+{
+    "success": true,
+    "timeseries": true,
+    "start_date": "2023-01-01",
+    "end_date": "2023-12-31",
+    "base": "USD",
+    "rates": {
+        "2023-01-01": {
+            "EUR": 0.934185
+        },
+        "2023-01-02": {
+            "EUR": 0.93656
+        },
+        "2023-01-03": {
+            "EUR": 0.94818
+        },
+        ... // Removed data to help clarify.
+        "2023-12-26": {
+            "EUR": 0.905595
+        },
+        "2023-12-27": {
+            "EUR": 0.9003
+        },
+        "2023-12-28": {
+            "EUR": 0.9003
+        }
+    }
+}
+```
+
+Get the json object `rates` content and add it the year file, `2023.json` in this case.
+
+This is the example of the content of the `2023.json` file.
+
+```json
+{
+    "2023-01-01": {
+        "EUR": 0.934185
+    },
+    "2023-01-02": {
+        "EUR": 0.93656
+    },
+    "2023-01-03": {
+        "EUR": 0.94818
+    },
+    ... // Removed data to help clarify.
+    "2023-12-26": {
+        "EUR": 0.905595
+    },
+    "2023-12-27": {
+        "EUR": 0.9003
+    },
+    "2023-12-28": {
+        "EUR": 0.9003
+    }
+}
+```
+
+The application will get the file when executed.