Update server.js

server.js

@@ -7,6 +7,7 @@ const path = require("path");
 const crypto = require("crypto");
 
 const app = express();
+app.set('json spaces', 4)
 const tempDir = os.tmpdir();
 
 function generateRandomHex(length) {
@@ -15,22 +16,26 @@ function generateRandomHex(length) {
 
 app.use("/tmp", express.static(tempDir));
 
-app.get("/", async (req, res) => {
+app.all("/", async (req, res) => {
     const captcha = svgCaptcha.create({
         size: 6,
         ignoreChars: "0oO1iIl",
         noise: 2,
-        color: true
+        color: false,
+        background: "#FFFFFF"
     });
 
-    const fileName = `tmp_${generateRandomHex(8)}.png`;
+    const fileName = `temp_${generateRandomHex(8)}.png`;
     const filePath = path.join(tempDir, fileName);
 
     const canvas = createCanvas(200, 80);
     const ctx = canvas.getContext("2d");
     const img = await loadImage(`data:image/svg+xml;base64,${Buffer.from(captcha.data).toString("base64")}`);
 
+    ctx.fillStyle = "#FFFFFF";
+    ctx.fillRect(0, 0, canvas.width, canvas.height);
     ctx.drawImage(img, 0, 0, 200, 80);
+
     const buffer = canvas.toBuffer("image/png");
 
     fs.writeFile(filePath, buffer, (err) => {