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Nginx Proxy Manager
Docker container for managing Nginx proxy hosts with a simple, powerful interface
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SurveyJS
Open-Source JSON Form Builder to Create Dynamic Forms Right in Your App. With SurveyJS form UI libraries, you can build and style forms in a fully-integrated drag & drop form builder, render them in your JS app, and store form submission data in any backend, inc. PHP, ASP.NET Core, and Node.js.
If you want to get more complicated but more secure, then best practice is to encrypt everywhere. I host my DNS on my Digital Ocean account and use the acme.sh script and the DNS API key to make internal certs on all my servers at hq.mydomain.com and my internal DNS server is set to handle all of those DNS requests.
Easy! Create a VM with Debian, install Docker, then create a Docker container with NGINX Proxy Manager. https://nginxproxymanager.com/