Update 'README.md'

README.md

@@ -17,7 +17,8 @@ In order to accomplish the smart water heater, the project will be in steps. The
 
 ![First step](firststep.png)
 
-### Hardware Components
+## Hardware Components
+-----------------------------------------------------------------------
 
 - Arduino Nano R3 https://create.arduino.cc/projecthub/products/arduino-nano-r3
 - Waterproof Digital Temperature Sensor https://www.hellasdigital.gr/electronics/sensors/temperature-sensors/waterproof-ds18b20-sensor-kit-kit0021/
@@ -25,15 +26,16 @@ In order to accomplish the smart water heater, the project will be in steps. The
 - Breadboard
 - Cables
 
-### Software Components
+## Software Components
-
+-----------------------------------------------------------------------
 - Arduino Software https://ubuntu.com/tutorials/install-the-arduino-ide#1-overview
 - Docker https://www.docker.com/
 - MongoDB https://docs.mongodb.com/manual/tutorial/install-mongodb-on-ubuntu/
 
 
-### Hardware Setup
+## Hardware Setup
-
+-----------------------------------------------------------------------
-### Software Setup
 
+## Software Setup
+-----------------------------------------------------------------------
 ## DOCS