Add headers description

messages/en-US.json

@@ -1504,6 +1504,7 @@
     "idpGoogleDescription": "Google OAuth2/OIDC provider",
     "idpAzureDescription": "Microsoft Azure OAuth2/OIDC provider",
     "customHeaders": "Custom Headers",
+    "customHeadersDescription": "Add custom headers to be sent when proxying requests. One per line in the format Header-Name: value",
     "headersValidationError": "Headers must be in the format: Header-Name: value.",
     "domainPickerProvidedDomain": "Provided Domain",
     "domainPickerFreeProvidedDomain": "Free Provided Domain",
@@ -1522,4 +1523,4 @@
     "resourceExposePortsEditFile": "Edit file: docker-compose.yml",
     "emailVerificationRequired": "Email verification is required. Please log in again via {dashboardUrl}/auth/login complete this step. Then, come back here.",
     "twoFactorSetupRequired": "Two-factor authentication setup is required. Please log in again via {dashboardUrl}/auth/login complete this step. Then, come back here."
-}
+}

src/app/[orgId]/settings/resources/[niceId]/proxy/page.tsx

@@ -1489,6 +1489,11 @@ export default function ReverseProxyTargets(props: {
                                                         rows={4}
                                                     />
                                                 </FormControl>
+                                                <FormDescription>
+                                                    {t(
+                                                        "customHeadersDescription"
+                                                    )}
+                                                </FormDescription>
                                                 <FormMessage />
                                             </FormItem>
                                         )}