Hi Josue,
welcome to the course and to the forum!
We just clean our bucket containers first with a cloth to get rid of any obvious dirt/coffee remains, and then with a weak bleach solution (10% bleach; 90% water) or sometimes with isoproanyl alcohol to keep them clean. We then put biodegradable bags inside the buckets as this reduces the amount of cleaning afterwards, but adding bags inside is certainly not essential. We used to just use buckets and clean them well each time + a light spray with bleach solution or alcohol.
best wishes, Adam