Added readme file and small change in the library that can create issues with users

Author: zumatt

README.md

@@ -1,2 +1,49 @@
 # Supabase-ESP32
-A library to connect to Supabase's Realtime Database from an ESP32 in realtime with API Key authentication.
+### A library to connect to Supabase's Realtime Database from an ESP32 in realtime with API Key authentication.
+
+The Arduino Nano ESP32 library provides a simple and efficient way to integrate Supabase.io's Realtime Database into your ESP32 projects. By leveraging API Key authentication, this library enables real-time communication between your ESP32 microcontroller and Supabase.io's powerful database infrastructure.
+
+To get started, simply include the library in your Arduino IDE and follow the provided documentation to establish a connection with Supabase.io. Once connected, you can easily retrieve, update, and synchronize data between your ESP32 and the Supabase.io Realtime Database.
+
+With the Arduino Nano ESP32 library, you can unlock the full potential of Supabase.io's Realtime Database and build IoT applications that seamlessly interact with cloud-based data. Start building your next project today!
+---
+#### Installation
+At the moment installation has to be done manually either on a global level (*libraries* folder in the main Arduino Sketch folder) or locally placed in the *libraries* folder inside your Sketch directory.
+The library will be soon available also from the Arduino IDE.
+
+For the time being when including it you'll have to go with
+```#include "SupabaseESP32.h"```
+
+#### Usage
+In order to setup the library you need to pass the following data.
+Please note that those data are available from you supabase database settings under the API tab (https://supabase.com/dashboard/project/PROJECT-CODE/settings/api).
+```
+#define supabaseUrl  "INSERT YOUR URL HERE"
+#define tableRealtime  "INSERT YOUR TABLE NAME HERE"
+#define supabaseApiKey  "INSERT YOUR API KEY HERE"
+```
+in order to let the client begin with the right information you need to call the following function:
+```SUPABASE supabaseClient(supabaseUrl, supabaseApiKey, tableRealtime);```
+
+Before start reading, updating or inserting any data in the database, you need to begin the connection by calling:
+```supabaseClient.begin();```
+
+After that line of code, you can use three different method in order to interact with the database:
+```
+//Read the data from the table
+    supabaseClient.read();
+
+//Update a specific row with a new value
+        int rowId = 1;
+        String column = "column_name";
+        double value = 100.0;
+    supabaseClient.update(rowId, column, value);
+
+
+//Insert a new row with a new value
+        column = "column_name";
+        value = 100.0;
+    supabaseClient.insert(column, value);
+```
+
+Under the examples you can find a .ino file that includes all the mentioned functions working.

src/SupabaseESP32.cpp

@@ -12,7 +12,7 @@ String supabase_table;
 SUPABASE::SUPABASE(String url, String key, String tableName)
 {
     supabase_table = tableName;
-    supabase_url = url + "/" + supabase_table;
+    supabase_url = url + "/" + supabase_table + "/rest/v1";
     supabase_key = key;
     supabase_bearer = "Bearer " + key;
 }