Update Raspberry Pi OS URL in README.md

README.md

@@ -14,8 +14,8 @@ The boost framework is convenient for serial communication, real time extensions
 
 ## Installation from scratch
 
-Download raspbian lite from https://www.raspberrypi.org/downloads/raspbian/
-and write the disk image to an SD card.
+Download raspbian lite from https://www.raspberrypi.org/software/operating-systems/
+and write the disk image to an SD card using the shell commands below, or use a utility like Balena Etcher.
 
 For example: 2019-09-26-raspbian-buster-lite.zip
 ```
@@ -77,7 +77,7 @@ $ git clone --recurse-submodules https://gitlab.science.ru.nl/biophysics-labs/fi
 Build and install LabStreamingLayer and AZMQ
 $ cd firmware
 $ make libs
-$ make install
+$ sudo make install
 
 Build the firmware applications
 $ make all