(1). What did you feel was cool about your basic idea (which seems to be to "wrap docker and kubernetics for easy microservice deployment in the cloud")? i.e. what excited you, what's really cool, about the technology idea, the original technological impetus?
(2). What benefit would other people feel, if they were completely ignorant and had never heard of docker or kubernetics or heroku etc? i.e. aiming here at the basic benefit. To illustrate, "easier to use than kubernetics" doesn't mean anything to someone who's never heard of kubernetics or its difficulties. (Many enterprise customers would be in exactly this perfect state of ignorance - they have enough to deal with with their actual domain!)
It wouldn't hurt to also consider what benefit that get from cloud hosting (assume they'd never heard of it, as unlikely as that is). Think of yourself as not converting fellow experts from other technologies, but as gaining adherents for the first time - they don't actually want your tech. They want the cloud and you are just the ladder.
(3). Finally, think about target users again, now not as completely ignorant, but in terms of and their current situation: their needs (what their bosses/customers need), their plans, how they presently do things, and especially what technologies they have actually heard of and basically know what they are. [ for example, I've heard of the cloud and docker, but I don't really know what the big deal about docker is. I've heard "kubernetics", but I don't know what it is. ] Now craft a message that speaks to these people, given their present situation and perspective.
There will actually be several different target customers, with different situations and knowledge, that would require different messages to really speak to them.
For example, I'd like a really simple way to write a bit of code and get it hosted in the cloud, for free, to make a simple webservice (or website). It seems it could be (should be) simple, but it isn't. That would be sensational! And great publicity for paid users (freemium, as you're already using).