Add membership backend and signer login

server/dev.js

@@ -0,0 +1,32 @@
+import { spawn } from 'node:child_process'
+
+const processes = [
+  spawn(process.execPath, ['server/server.js'], {
+    stdio: 'inherit',
+    env: { ...process.env, PORT: process.env.PORT || '3001' },
+  }),
+  spawn(process.execPath, ['node_modules/vite/bin/vite.js', '--host'], {
+    stdio: 'inherit',
+    env: process.env,
+  }),
+]
+
+let isShuttingDown = false
+
+const shutdown = (code = 0) => {
+  if (isShuttingDown) return
+  isShuttingDown = true
+  for (const child of processes) {
+    if (!child.killed) child.kill('SIGTERM')
+  }
+  process.exit(code)
+}
+
+for (const child of processes) {
+  child.on('exit', (code) => {
+    if (!isShuttingDown && code !== 0) shutdown(code || 1)
+  })
+}
+
+process.on('SIGINT', () => shutdown(0))
+process.on('SIGTERM', () => shutdown(0))