fixed warnings from eslint

src/app/api/proxy/functions.ts

@@ -1,8 +1,10 @@
 import type { NextRequest } from 'next/server'
 import { NextResponse } from 'next/server'
 
-/// Resend request to backend.
-/// Body is being sent as stream.
+/**
+ * Resend request to backend.
+ * Body is being sent as stream.
+ */
 export async function redirectRequest(
     req: NextRequest,
     proxyUrl: string,
@@ -26,8 +28,7 @@ export async function redirectRequest(
         method: req.method,
         headers: req.headers,
         body: req.body,
-        // @ts-ignore
-        duplex: 'half', // some property required by nodejs but not defined in @types/node
+        duplex: 'half', // required by nodejs when the body is a stream, see src/types/fetch.d.ts
     })
 
     return new NextResponse(backendRes.body, {
@@ -41,9 +42,14 @@ export async function redirectRequest(
     })
 }
 
-/// Browsers send OPTIONS request sometimes to check webserver's allowed headers and methods.
-/// My C# backend doesn't support OPTIONS, so the proxy answer to OPTIONS request that all headers and methods are allowed.
-export async function responseToOPTIONS(
+/**
+ * Browsers send OPTIONS request sometimes to check webserver's allowed
+ * headers and methods.
+ * My C# backend doesn't support OPTIONS, so the proxy answer to OPTIONS
+ * request that all headers and methods are allowed.
+ */
+export async function respondToOPTIONS(
+    // eslint-disable-next-line @typescript-eslint/no-unused-vars -- required by the nextjs route handler signature
     req: NextRequest
 ): Promise<NextResponse> {
     // console.log('proxy responding to CORS OPTIONS', req.url)

src/app/api/proxy/saveParserBackend/[[...path]]/route.ts

@@ -1,9 +1,6 @@
 import type { NextRequest } from 'next/server'
 import { NextResponse } from 'next/server'
-import {
-    redirectRequest,
-    responseToOPTIONS as respondToOPTIONS,
-} from '@/app/api/proxy/functions'
+import { redirectRequest, respondToOPTIONS } from '@/app/api/proxy/functions'
 import { PROXY_PATHS } from '@/app/api/proxy/paths'
 import { appConfig } from '@/lib/configLoader'