build: add release scripts

build/artifacts.sh

@@ -0,0 +1,21 @@
+#!/bin/bash
+
+declare -a arr=(
+	"linux/amd64"
+	"linux/arm64"
+	"darwin/amd64"
+	"darwin/arm64"
+)
+
+mkdir -p bin/artifacts
+
+for i in "${arr[@]}"
+do
+	GOOSARCH=$i
+	GOOS=${GOOSARCH%/*}
+	GOARCH=${GOOSARCH#*/}
+	BINARY_NAME=piko-$GOOS-$GOARCH
+
+	echo "Building $BINARY_NAME..."
+	GOOS=$GOOS GOARCH=$GOARCH go build -o bin/artifacts/$BINARY_NAME main.go
+done

build/tag.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+set -e
+
+# The version must be supplied from the environment. Do not include the
+# leading "v".
+if [ -z $VERSION ]; then
+    echo "Please specify a version."
+    exit 1
+fi
+
+git tag -a -m "Version $VERSION" "v${VERSION}" main
+
+exit 0