added release script

release

@@ -0,0 +1,42 @@
+#!/usr/bin/env bash
+
+build() {
+	sudo docker buildx build -t mikognn/opentracker:$1 --platform linux/amd64,linux/arm64,linux/arm64/v8,linux/arm/v7 .
+	echo "Do you want to push to docker.io? [Y/n] "
+	read answer
+	if [ "$answer" == "y" ] || [ "$answer" == "" ]; then
+		sudo docker push mikognn/opentracker:$1
+	else
+		echo "not pushing."
+	fi
+}
+
+help() {
+	cat << EOF
+USAGE: release --version <version>
+EOF
+}
+
+tag="latest"
+
+while [ $# -gt 0 ]; do
+	case $1 in
+		--version|-v)
+			shift
+			if [ "$1" == "" ]; then
+				echo "ERROR: version missing"
+				help
+				exit 1
+			fi
+			tag=$1
+			shift
+			;;
+		*)
+			help
+			exit 1
+			;;
+	esac
+	shift
+done
+
+build $tag