How do I enable HTTPS for my Docker containers using Nginx?

To set up HTTPS, you'll first need to get a CA certificate. The easiest way is to register a domain and use either the HTTPS-01 or DNS-01 challenge to obtain your public and private keys. Make sure to keep your private key secure! Next, redirect HTTP traffic (port 80) to HTTPS by adding this configuration in your Nginx server block:

```nginx
server {
listen 80;
server_name _;
return 301 https://$host$request_uri;
}
```
Once that's set, configure your HTTPS reverse proxy normally while ensuring you include your keys. It's essential for secure connections!

Consider using Caddy instead. It handles automatic HTTPS for you, making the setup way simpler!

For a straightforward solution, check out these GitHub repositories:
- [nginx-proxy](https://github.com/nginx-proxy/nginx-proxy)
- [acme-companion](https://github.com/nginx-proxy/acme-companion)

Essentially, you’ll set up Nginx to handle traffic to your containers, a generator that updates your Nginx config, and an ACME companion for managing Let's Encrypt certificates. Easy peasy!

A popular approach is to set up a reverse proxy. This proxy listens on ports 80 and 443, providing HTTPS/SSL. It can route traffic internally to your target containers without needing to expose their ports directly. For Docker setups, run the proxy as a container in a shared Docker network with your other containers. There are plenty of guides out there on this! Look into reverse proxies like Caddy, Traefik, or Nginx Proxy Manager. They often come with built-in support for Let's Encrypt, so you don't need a separate CA. They'll manage your SSL certificates automatically!