Update build_rpi instructions

raspberrypi/build_rpi/Readme.md

@@ -6,13 +6,33 @@
   a. verify that docker is installed. Run `docker --version`
 4. save the autostart file in /etc/xdg/openbox/
 5. copy the .bash_profile file into the initial user's home directory (~/.bash_profile)
-6. copy the ./Aliro/raspberrypi/intropage directory into the user's home directory (~/intropage)
-7. copy the extracted contents of the Aliro-*.zip file from the GitHub release page into the user's home page. (~/target)
-8. change directory into ~/target/production/Aliro-*/ and run `docker compose pull`
+6. copy the ./Aliro/raspberrypi/intropage directory into the root directory (/intropage)
+7. copy the extracted contents of the Aliro-*.zip file from the GitHub release page into the root directory. (/target)
+8. change directory into /target/production/Aliro-*/ and run `docker compose pull`
   **NOTE:** The docker images will only be **pulled**. The containers will not be built inside the Pi (to keep the final custom OS as light as possible)
-9. run clean.sh
+9. copy the aliroed-compose.service file in /etc/systemd/system/ (`sudo cp aliroed-compose.service /etc/systemd/system/`
+10. enable the aliroed-compose service with `sudo systemctl enable aliroed-compose.service`
+12. Remove any unused kernels:
+use `uname -r` to check the current kernel in use  
+use `dpkg -l | grep linux-image` to see a list of installed kernels
+remove the ones we don't need with `sudo apt purge linux-image-<kernel-name>`
+13. Zero out free space for better compression:
+    This one was useless!
+Inside the Raspberry Pi, run `sudo dd if=/dev/zero of=/EMPTY bs=1M` and `sudo rm -f /EMPTY`
+14. run clean.sh
 
 # Building the aliro-image executable
 ## Windows
-
+Perform these steps after performing the steps in Linux to extract the .img file, shrinking with PiShrink and compressing with xz.
+These steps work on a Windows 11 machine:
+1. Ensure you have a Code Signing Certificate installed.
+2. Embed the aliro.img.xz file in the same level as the **src** directory. 
+3. Open the Epistasis/aliro-imager project in Qt Creator (follow the instructions on the aliro-imager repository)
+4. Configure the version number as needed. The current scheme is to use the version of the latest Aliro Release (e.g. 0.21)
+5. Proceed to `Build All Projects` in Qt Creator
+6. Use `nsis-binary-7336-1` to build the installer, using the **aliro-imager.nsi** script output by the Qt Creator build.
 ## Linux
+1. Extract the image into a **.img** file with a tool like **dd**: `sudo dd if=/dev/sdX of=aliroed.img bs=4M`
+2. Use PiShrink to shrink the image. The image should also be compressed with **xz**. There are 2 options for this: `sudo ./pishrink.sh aliroed.img`
+    a. use PiShrink with the -Z option, or 
+    b. use the `xz` utility independently: `xz -9 aliroed.img` (**Note: This option has worked best so far**)

raspberrypi/build_rpi/aliroed-compose.service

@@ -0,0 +1,12 @@
+[Unit]
+Description=AliroEd Docker Service
+After=docker.service
+Requires=docker.service
+
+[Service]
+Restart=always
+WorkingDirectory=/target/production/Aliro-0.21
+ExecStart=/usr/bin/docker compose up -d
+
+[Install]
+WantedBy=multi-user.target

raspberrypi/build_rpi/clean.sh

@@ -9,6 +9,10 @@ sudo apt purge bluez -y
 sudo apt autoremove -y
 sudo apt autoclean -y
 sudo apt clean -y
+sudo journalctl --vacuum-time=7d
+docker builder prune --all
+sudo rm -rf /var/log/*
+sudo rm -rf /tmp/*
 # clear bash history
 history -c