stage 00 readme done

bootstrap.sh

@@ -0,0 +1,39 @@
+#!/bin/sh
+
+# check OS/architecture
+
+esc() {
+	: # comment out the following line to disable color output
+	printf '\33[%dm' "$1"
+}
+
+echo_red() {
+	esc 31
+	echo "$1"
+	esc 0
+}
+
+echo_green() {
+	esc 32
+	echo "$1"
+	esc 0
+}
+
+if uname -a | grep -i 'x86_64' | grep -i -q 'linux'; then
+	: # all good
+else
+	echo_red "Only 64-bit Linux is supported. This doesn't seem to be 64-bit Linux."
+	exit 1
+fi
+
+cd 00
+rm -f B
+./hexcompile A
+if [ "$(cat B)" != 'Hello, world!' ]; then
+	echo_red 'Stage 00 failed.'
+	exit 1
+fi
+rm -f B
+cd ..
+
+echo_green 'Done all stages!'