[Project] Added README

README.md

@@ -0,0 +1,58 @@
+# Raspberry Pi Image builder
+
+This repository contains scripts to build a Raspberry Image from scratch.
+
+Currently it is focused on Raspberry Pi 4 with a 64-bit architecture with the following features built-in:
+* Based on Debian Stretch
+* Latest Kernel build from https://github.com/raspberrypi/linux.git
+  * This includes building a GCC tool chain from https://ftp.gnu.org/gnu/binutils and GCC from https://ftp.gnu.org/gnu/gcc
+* WiringPi 2.50 installed
+* Java 11
+* Apache Tomcat 9
+* Prepared for I2C, 1-Wire over I2C and GPIO usage
+* Basic Firewall (Deny all but 22, 8080, 443, 5353 and ICMP)
+
+# Usage
+
+Usage is simple:
+* Clone this repository
+* Change the default username of `pi` of the `NEW_USER` variable in the following files to suit your needs:
+  * bootstrap_rpi4.sh
+  * customize_rpi4.sh
+  * etc/rc.local
+* Customize the `customize_rpi4.sh` script anyhow you see fit 
+* Run the script as `sudo ./bootstrap_rpi4.sh`
+* After bulding, you will have a new file called `raspbian-rpi4_arm64-<date>.img`
+
+**Note:** The initial build will take a long time, as it downloads the Kernel sources, tool chain and GCC and builds them all. Depending on the powerfulness of your system, you might want to modify the `JOBS` variable in `install-kernel-rpi4.sh`.
+
+# Issues
+
+There is a bug where on an Ubuntu/Debian system the vmdebootstrap script might fail as it was not designed to build 64-bit ARM images. The workaround is to patch the script as follows:
+
+    sudo vi /usr/lib/python2.7/dist-packages/vmdebootstrap/constants.py
+    ---
+    vmdebootstrap/constants.py | 2 +-
+    1 file changed, 1 insertion(+), 1 deletion(-)
+
+    diff --git a/vmdebootstrap/constants.py b/vmdebootstrap/constants.py
+    index 9f39415..3d807c6 100644
+    --- a/vmdebootstrap/constants.py
+    +++ b/vmdebootstrap/constants.py
+    @@ -46,7 +46,7 @@ arch_table = {  # pylint: disable=invalid-name
+             'package': 'grub-efi-arm64',
+             'bin_package': 'grub-efi-arm64-bin',
+             'extra': None,
+    -        'exclusive': True,
+    +        'exclusive': False,
+             'target': 'arm64-efi',
+         }
+     }
+    --
+    2.9.3
+
+# Resources
+
+These scripts were built with help from:
+* https://github.com/niklasf/build-raspbian-image
+* https://blog.cloudkernels.net/posts/rpi4-64bit-image/