It is interesting, what is most preferred tech stack for solo developers?

For me its:
Django
Django Rest Framework
Bootstrap
Postgres
Heroku/Digital Ocean for deployment
Github (since they have free private repo now)
Vue.js

I use Elixir, which eliminates the need for Nginx, Redis or Docker. I just ship standard Elixir releases to the server, so the stack is:

• Elixir / Phoenix Framework
• Postgres
• Ubuntu
• (Nginx not needed)
• Elixir's built-in OTP tools for in memory store
• Elixir releases and Edeliver for deployment
• Gitlab for CI / CD

It's very productive and handles well over 1,000 requests/second on a $5/month digital ocean droplet.

For me its

• Ruby/Rails
• Sidekiq
• Postgres
• Nginx/Heroku
• Github

I used to do a lot of Rails. These days my default tool of choice is Elixir & Phoenix.

PostgreSQL
Heroku (AWS for more complex scenarios)
TailwindCSS

I use almost the same as you:

PHP - Laravel Framework
VueJs
MySQL
Nginx
Redis
Debian
Git

React, Django, Postgres, Redis, Docker, Terraform

My goto lately:

Django + Django Rest Framework
Tailwind CSS
Parcel
Docker + Traefik + Watchtower
Postgres
Digital Ocean
GitHub (slightly preferred) but GitLab to my Docker Registry

<or>

Jekyll for static projects
GitHub Pages or Netlify for hosting

Frontend: VueJs
Backend: NodeJs, Typescript, Postgres
Http:NginX
Testing: Mocha, Chai
Os: Ubuntu
DevOps: Ansible
Hosting: Own servers colocated

Whatever technology you're comfortable with that makes the most sense for the project. I need an API and I work with .net core, so will make it in that. I need to run some analytics so learned R and will be using that. Whatever you need to get your project out the door and in customers hands.

Haskell / ReactJS / PostgreSQL / Baremetal hosting