Apply suggestions from code review

Co-authored-by: Daniel Norman <1992255+2color@users.noreply.github.com>
Co-authored-by: Marcin Rataj <lidel@lidel.org>

docs/environment-variables.md

@@ -54,7 +54,7 @@ disabled, and **response types requested via `?format=` and `Accept` HTTP header
 - [`application/vnd.ipfs.ipns-record`](https://www.iana.org/assignments/media-types/application/vnd.ipfs.ipns-record)
 
 **NOTE:** This setting is applied on top of everything else, to ensure
-trustless domain can't be used for phishing or direct hotlinking and hosting of third-party content.
+trustless domains can't be used for phishing or direct hotlinking and hosting of third-party content. Hostnames that are passed to both `RAINBOW_GATEWAY_DOMAINS` and `RAINBOW_TRUSTLESS_GATEWAY_DOMAINS` will work only as trustless gateways. 
 
 Example:  passing `trustless-gateway.link` will ensure only verifiable content types are supported
 when request comes with the `Host` header set to `trustless-gateway.link`.

handlers.go

@@ -138,7 +138,7 @@ func setupGatewayHandler(cfg Config, nd *Node) (http.Handler, error) {
 	for _, domain := range cfg.TrustlessGatewayDomains {
 		publicGateways[domain] = &gateway.PublicGateway{
 			Paths:                 []string{"/ipfs", "/ipns", "/version"},
-			NoDNSLink:             noDNSLink,
+			NoDNSLink:             true,
 			InlineDNSLink:         true,
 			DeserializedResponses: false,
 			UseSubdomains:         contains(cfg.SubdomainGatewayDomains, domain),