Enable various eslint rules (#1773)

## Description:

Enable various eslint rules.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

src/server/Cloudflare.ts

@@ -8,39 +8,39 @@ const log = logger.child({
   module: "cloudflare",
 });
 
-export interface TunnelConfig {
+export type TunnelConfig = {
   domain: string;
   subdomain: string;
   subdomainToService: Map<string, string>;
-}
+};
 
-interface TunnelResponse {
+type TunnelResponse = {
   result: {
     id: string;
     token: string;
   };
-}
+};
 
-interface ZoneResponse {
+type ZoneResponse = {
   result: Array<{
     id: string;
   }>;
-}
+};
 
-interface DNSRecordResponse {
+type DNSRecordResponse = {
   result: Array<{
     id: string;
   }>;
-}
+};
 
-interface CloudflaredConfig {
+type CloudflaredConfig = {
   tunnel: string;
   "credentials-file": string;
   ingress: Array<{
     hostname?: string;
     service: string;
   }>;
-}
+};
 
 const CloudflareTunnelConfigSchema = z.object({
   a: z.string(),
@@ -63,7 +63,7 @@ export class Cloudflare {
 
   private async makeRequest<T>(
     url: string,
-    method: string = "GET",
+    method = "GET",
     data?: any,
   ): Promise<T> {
     const response = await fetch(url, {

src/server/Gatekeeper.ts

@@ -12,7 +12,7 @@ export enum LimiterType {
   WebSocket = "websocket",
 }
 
-export interface Gatekeeper {
+export type Gatekeeper = {
   // The wrapper for request handlers with optional rate limiting
   httpHandler: (
     limiterType: LimiterType,
@@ -24,7 +24,7 @@ export interface Gatekeeper {
     req: http.IncomingMessage | string,
     fn: (message: string) => Promise<void>,
   ) => (message: string) => Promise<void>;
-}
+};
 
 let gk: Gatekeeper | null = null;
 

src/server/MapPlaylist.ts

@@ -49,10 +49,10 @@ const frequency: Partial<Record<GameMapName, number>> = {
   Yenisei: 1,
 };
 
-interface MapWithMode {
+type MapWithMode = {
   map: GameMapType;
   mode: GameMode;
-}
+};
 
 const TEAM_COUNTS = [
   2,

src/server/Privilege.ts

@@ -1,7 +1,7 @@
 import { Cosmetics, Pattern } from "../core/CosmeticSchemas";
 import { PatternDecoder } from "../core/PatternDecoder";
 
-export interface PrivilegeChecker {
+export type PrivilegeChecker = {
   isPatternAllowed(
     base64: string,
     flares: readonly string[] | undefined,
@@ -10,7 +10,7 @@ export interface PrivilegeChecker {
     flag: string,
     flares: readonly string[] | undefined,
   ): true | "restricted" | "invalid";
-}
+};
 
 export class PrivilegeCheckerImpl implements PrivilegeChecker {
   private b64ToPattern: Record<string, Pattern> = {};