adds forge support, fixes some critical errors

routes/api/fabric/index.ts

@@ -0,0 +1,43 @@
+import { Handler, Handlers } from "$fresh/server.ts";
+import { SERVER_STATE } from "../../../state/serverState.ts";
+import { downloadFile } from "../../../util/download.ts";
+
+export const handler: Handlers = {
+  async GET(_req, _ctx) {
+    const gameVersions = JSON.parse(
+      await Deno.readTextFile("./fabric/versions/game.json"),
+    );
+    const installerVersions = JSON.parse(
+      await Deno.readTextFile("./fabric/versions/installer.json"),
+    );
+    const loaderVersions = JSON.parse(
+      await Deno.readTextFile("./fabric/versions/loader.json"),
+    );
+
+    return new Response(JSON.stringify({
+      gameVersions,
+      installerVersions,
+      loaderVersions,
+    }));
+  },
+  async POST(req, _ctx) {
+    try {
+      const data = await req.formData();
+      const game = data.get("game");
+      const installer = data.get("installer");
+      const loader = data.get("loader");
+
+      await downloadFile(`https://meta.fabricmc.net/v2/versions/loader/${game}/${loader}/${installer}/server/jar`, './server/server.jar')
+      
+      SERVER_STATE.serverType = 'fabric';
+      SERVER_STATE.startMCServer();
+
+      const url = new URL(req.url);
+
+      return Response.redirect(url.origin + "/setup/eula", 303);
+    } catch (e) {
+      console.log(e)
+      return new Response("Something bad happened", { status: 500 });
+    }
+  },
+};