Add wizard proxy for localhost access in test container

Dockerfile

@@ -28,4 +28,4 @@ WORKDIR /app
 COPY package*.json ./
 RUN npm install && npm install -g playwright && playwright install chromium
 COPY . .
-CMD ["npx", "playwright", "test"]
+CMD ["bash", "-lc", "node server/wizard-proxy.mjs & npx playwright test"]

server/wizard-proxy.mjs

@@ -0,0 +1,32 @@
+import http from 'http'
+
+const listenPort = Number(process.env.WIZARD_PORT || 8080)
+const targetHost = process.env.WIZARD_HOST || 'wizard'
+const targetPort = Number(process.env.WIZARD_PORT || 8080)
+
+http
+  .createServer((req, res) => {
+    const proxyReq = http.request(
+      {
+        hostname: targetHost,
+        port: targetPort,
+        path: req.url,
+        method: req.method,
+        headers: req.headers,
+      },
+      (proxyRes) => {
+        res.writeHead(proxyRes.statusCode || 502, proxyRes.headers)
+        proxyRes.pipe(res)
+      }
+    )
+
+    proxyReq.on('error', (err) => {
+      res.statusCode = 502
+      res.end(`Bad gateway: ${err.message}`)
+    })
+
+    req.pipe(proxyReq)
+  })
+  .listen(listenPort, '127.0.0.1', () => {
+    console.log(`wizard proxy listening on 127.0.0.1:${listenPort} -> ${targetHost}:${targetPort}`)
+  })