Mahdi Perfect

Kibana and ELK stack is way far better in enterprise solution. But if you are going to deploy something smal, it does't worth the configuration and maintenance of the ELK stack. You'll have lots of challenges every day. If you have a small team, I do not recommend on-promiss ELK. You can also consider ELK hosted services which are very easier to use, like logz.io

Postgres have never disappointed me. I wouldn't choose MongoDb unless I've had strong reasons to choose it.

A good collaboration tool was always a big challene in the most team I've met. The main challenge is there are many tools with tons of features. They'r all great in the paper. But in practice, the team usually doesn't enjoy collaborating using them. This is the challenging part. The project management tools should be well designed to keep simplicity in combination with well-chosen features to bring the most productivity and activity among the team. I'm thinking about many of my stacks, ClickUp is one of the few choices which I've never thought about migrating about. I can't describe it in text, I just advise you to try it once and you'll understand. The team behind ClickUp is really active. They really care about delivering new features.