I'm relatively new to self hosting. I set up a SearxNG on my local network and then recently set up Pi-Hole. Searx is running in a docker container and Pi-Hole is not. However, after setting up Pi-hole the IP I use to connect to Searx now directs to the default the default placeholder page. So my Pi-hole runs on 192.168.0.19/admin and Searx used to run just on 192.168.0.19. I'm guessing there's a config somewhere that I can change to make both work at once I'm just not sure where. Google was less than helpful (or maybe I'm an idiot lol) so I was hoping someone here may have run into a similar issue.
You need a reverse proxy to accomplish this. The reverse proxy will have port 80 exposed and points PiHole/Searx containers and their respective ports for the paths you specify.