L2SDP-483, add info file for setting up raspberrypi

Closes L2SDP-483

developing_on_raspberrypi.md

+#### Setting up Raspberrypi-4 for running and developing the sdp translator (sdptr)
+
+##### Install raspbian os on a SDcard.
+
+Download Raspberry Pi Imager for your operating system
+
+Linux:        https://downloads.raspberrypi.org/imager/imager_latest_amd64.deb
+Windows: https://downloads.raspberrypi.org/imager/imager_latest.exe
+macOS:     https://downloads.raspberrypi.org/imager/imager_latest.dmg 
+
+Install and run the Imager (you need a sd-card reader).
+
+- CHOOSE OS,  "Raspberry Pi OS (other)"  >  "Raspberry Pi OS Lite (32-bit)"
+- CHOOSE STORA..., "Select SDcard"
+- WRITE.
+
+If done, add empty file SSH to root of disk to activate the ssh server.
+
+```shell
+cd [SDcard]
+touch SSH
+```
+
+##### Startup and configuration.
+
+Put the SD-card in the RaspberryPi and startup, login=pi, password=raspberry.
+
+```shell
+sudo raspi-config
+```
+
+For only running "sdptr" more is not needed.
+
+------
+
+##### Setup for developing sdptr.
+
+Install missing tools/programs.
+
+```shell
+sudo apt-get install build-essential gcc pkg-config cmake autoconf automake
+sudo apt-get install vim screen
+```
+
+Add a git directory.
+
+```shell
+mkdir ~/git
+cd ~/git
+```
+
+##### Installation of open62541 opc-ua library.
+
+The opc-ua library is needed by sdptr.
+
+ Get source code:
+
+```shell
+git clone https://github.com/open62541/open62541.git
+cd ~/git/open62541
+git submodule update --init --recursive
+```
+
+Compile and install.
+
+```shell
+mkdir ~/git/open62541/build
+cd ~/git/open62541/build
+cmake ..
+make
+sudo make install
+```
+
+##### Installation and compiling sdptr.
+
+Install from git repository.
+
+```shell
+cd ~/git
+git clone https://git.astron.nl/lofar2.0/sdptr.git
+```
+
+First time or after changing the Makefile
+
+```shell
+cd ~/git/sdptr
+autoreconf -f -i
+./configure
+```
+
+Compile sdptr.
+
+```shell
+cd ~/git/sdptr
+make
+```
+
+##### Running sdptr.
+
+sdptr can run without hardware connected.
+
+```shell
+cd ~/git/sdptr/src
+./sdptr --configfile sdptr.conf --nodaemon --type LTS
+```
+