Proper way to showcase multi-container web app to customers I have a web app consisting of multiple services (authentication service, database, main web app..), and each of these services can run in container.
Currently, when a customer ask for a demo, I am creating and running new instance of these containers on new open ports.
But, it seems like this is not the right way to do, because each container is just consuming 1 GB RAM of my host machine (currently total 32 GB), even it is not used by anyone.
What is your suggestions and is there any on hand solutions for this scenario? 
What should I research to find a solution for my need?

Edit response to comments: 


Firstly, it is not a laptop :), It is just a VM on Azure(32GB and 4 CPU),
actually, yes,  it's like laptop :(
My customers want to (actually I want) test/evaluate my app without any installation, just filling a demo request form and then I will send them a mail to say "your main web app is running on http://somehost:someport, you can use it now!"
Currently, I can perform the situation mentioned above, and someone who wants to use my app can use it. But it is not efficient.(???)
You mention swarm/kubernates, So my main question is that; Is solution for my need is should be using swarm? If yes, How? is there an best practice approach you can share with me?


Now I will search on how to make my own SaaS system:)
You mention that you are demonstrating this for a customer. The first question you should ask yourself (or, more pertinently, the customer) is :


  what does this customer really want?


Why have they come to you for this work? What is the pain they are currently feeling, what value are you providing to them.

Then, compare and contrast - show them the delta that your solution brings to them.


It may be for example that they want to maintain a legacy application, but upgrade the hardware or underlying components ? In that case, show them how you have contained them with no negative experience to their users.
It may be that they need to scale the capacity for usage of their application   - they want to be able to meet demand elastically. Show them how by deploying in a container setup, you can scale out.
It may be that they need four nines reliability - show them that you can have an easier HA setup - knock out one of the instances and prove that the application still works.
It may be that they want faster delivery with no little impact on quality. Show that your delivery pipeline works smoothly with some automated tests and QA, with delivery and deployment.


TL;DR : Find out what your customer wants. Demonstrate the existing way of doing things. Compare it with the "new" way, and highlight the delta.