Use timeout for Gemini requests

fetch/gemini.go

@@ -28,8 +28,10 @@ import (
 
 // fetchGemini will make a request for a gemini resource
 func fetchGemini(remote string) (*gemini.Response, error) {
+	ctx, cancel := context.WithTimeout(context.Background(), time.Duration(core.Timeout)*time.Second)
+	defer cancel()
 	client := &gemini.Client{}
-	resp, err := client.Get(context.Background(), remote)
+	resp, err := client.Get(ctx, remote)
 	if err != nil {
 		return nil, err
 	}