working + many improvements

ryuji new features, saki changes, write build code, bump makoto version, add preview

preview.ts

@@ -0,0 +1,56 @@
+import { createServer } from 'http';
+import * as path from 'path';
+import { existsSync, readFileSync } from 'fs';
+
+const port: number = 8042;
+
+createServer((req, res) => {
+  let req_path: string;
+  if (!req.url.includes(".")) {
+    req_path = path.join(__dirname, "build", req.url, "index.html");
+  } else {
+    req_path = path.join(__dirname, "build", req.url);
+  }
+  if (!existsSync(req_path)) {
+    res.writeHead(404);
+    //write file
+    res.write("404");
+    return res.end();
+  }
+  //set content type
+  let non_utf8_content_types: string[] = ["image/png", "image/gif"];
+  let content_type: string;
+  switch (req_path.split(".")[1]) {
+    case "html":
+      content_type = "text/html; charset=utf-8";
+      break;
+    case "css":
+      content_type = "text/css; charset=utf-8";
+      break;
+    case "js":
+      content_type = "text/javascript";
+      break;
+    case "png":
+    case "ico":
+      content_type = "image/png";
+      break;
+    case "gif":
+      content_type = "image/gif";
+      break;
+    default:
+      content_type = "text/plain";
+  }
+  res.writeHead(200, {
+    'Content-Type': content_type,
+  });
+  //write file
+  if (non_utf8_content_types.includes(content_type)) {
+    res.write(readFileSync(req_path));
+  } else {
+    res.write(readFileSync(req_path, "utf-8"));
+  }
+  //end response
+  res.end();
+}).listen(port);
+
+console.log(`Preview on port ${port}`);