Added setup instructions

README.md

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+# FBDASH - lightweight dashboard for the RaspberryPi without X (using framebuffer only)
+In order to setup the dashboard start with cloning this repo ;)
+    git clone https://git.klelifo.de/flo/fb-dash
+    cd fb-dash
+
+
+
+# Configure the display
+**TL;DR** just run ```make rpi-config```
+
+Some work is needed before we can actually use the ILI9341 display with the RaspberryPi.\
+Essentially we need to
+* Enable the SPI interface
+* Load the fbtft_device kernel module with the correct parameters
+to get a working /dev/fb1 framebuffer device.
+
+## Enable SPI interface on the raspberry pi
+    echo "dtparam=spi=on" | sudo tee -a /boot/config
+
+## Activate modules to be loaded at boot
+    echo "spi_bcm2835" | sudo tee -a /etc/modules
+    echo "fbtft_device" | sudo tee -a /etc/modules
+    echo "options fbtft_device name=rpi-display gpios=reset:25,dc:24,led:18" | sudo tee -a /etc/modprobe.d/fbtft_device.conf
+
+
+
+
+# Setup fbdash binary
+***TL;DR** just run ```sudo apt install -y libmariadb2 && make install```
+
+After the display is setup we can build and install the fbdash binary.
+
+## Build the sources
+    sudo apt install libmariadb2
+    make
+
+## Install in /usr/bin
+    sudo make install
+
+## Test it 
+    fbdash
+
+
+
+# Use systemd for regular updates
+While we could also use cron for regular execution of the fbdash binary I opted to use systemd this time.\
+The future is now ... ;)
+
+## Install unit files
+**TL;DR** just run ```make systemd-config```
+
+The following files use systemd to setup a regular update of the dashboard screen (60s by default).\
+If you like to change the default, just edit the ```fbdash.timer``` file before reloading systemctl
+
+    sudo cp setup/fbdash.service setup/fbdash.timer /etc/systemd/system
+    sudo systemctl daemon-reload
+    sudo systemctl enable fbdash.timer
+    sudo systemctl start fbdash.timer
+
+## Check timers
+    systemctl list-timers
+    NEXT                          LEFT       LAST                          PASSED      UNIT                         ACTIVATES
+    Wed 2022-05-04 14:16:10 CEST  28s left   Wed 2022-05-04 14:15:10 CEST  31s ago     fbdash.timer                 fbdash.service
+    ...
+
+
+