feat(scripts): add new scripts

scripts/build_exec.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+set -o nounset errexit
+
+export QSROOT=`pwd`
+rm -r dist && mkdir dist
+docker builder prune
+
+# set this for builders behind GFW...
+go env -w GOPROXY=https://goproxy.cn,direct
+go get -d -v ./...
+go get github.com/mitchellh/gox
+cd cmd/start
+gox \
+    -osarch="linux/amd64" \
+    -output "$QSROOT/dist/quickshare/start"