feat: verify license responses with public key

scripts/build-protected.ps1

@@ -0,0 +1,20 @@
+param(
+  [string]$Output = "bin/mediastation-go-protected.exe",
+  [switch]$Garble
+)
+
+$ErrorActionPreference = "Stop"
+$env:CGO_ENABLED = "0"
+
+New-Item -ItemType Directory -Force -Path (Split-Path -Parent $Output) | Out-Null
+
+if ($Garble) {
+  if (-not (Get-Command garble -ErrorAction SilentlyContinue)) {
+    throw "garble is not installed. Run: go install mvdan.cc/garble@latest"
+  }
+  garble -literals -tiny build -trimpath -ldflags="-s -w -buildid=" -o $Output ./cmd/server
+  exit $LASTEXITCODE
+}
+
+go build -trimpath -buildvcs=false -ldflags="-s -w -buildid=" -o $Output ./cmd/server
+exit $LASTEXITCODE