feat: Create a ruby script to download a release binaries

and get SHA256 checksums

scripts/release-checksums.rb

@@ -0,0 +1,29 @@
+#!/usr/bin/env ruby
+
+tag = ARGV[0]
+puts "generate release checksums for #{tag}"
+
+windows_exe = "https://github.com/nervosnetwork/neuron/releases/download/#{tag}/Neuron-#{tag}-win-installer.exe"
+macos_zip = "https://github.com/nervosnetwork/neuron/releases/download/#{tag}/Neuron-#{tag}-mac.zip"
+macos_dmg = "https://github.com/nervosnetwork/neuron/releases/download/#{tag}/Neuron-#{tag}-mac.dmg"
+linux_appimage = "https://github.com/nervosnetwork/neuron/releases/download/#{tag}/Neuron-#{tag}-linux-x86_64.AppImage"
+
+# TODO: Download binaries and calculate checksums
+
+windows_exe_sha256 = "{WINDOWS_EXE_SHA256}"
+macos_zip_sha256 =  "{MACOS_ZIP_SHA256}"
+macos_dmg_sha256 = "{MACOS_DMG_SHA256}"
+linux_appimage_sha256 = "{LINUX_APPIMAGE_SHA256}"
+
+checksums = %(
+### Downloads
+
+OS | Arch | Package | SHA256 Checksum
+-- | -- | -- | --
+Windows | x64 | [exe](#{windows_exe}) | <code>#{windows_exe_sha256}</code>
+macOS | x64 | [zip](#{macos_zip}) | <code>#{macos_zip_sha256}</code>
+macOS | x64 | [DMG](#{macos_dmg}) | <code>#{macos_dmg_sha256}</code>
+Linux | x64 |  [AppImage](#{linux_appimage}) | <code>#{linux_appimage_sha256}</code>
+)
+
+puts checksums