Uncheck all the DLCs except for wetland, you should have maybe 8 animals left. Play with the habitat options abit if you don’t, but eventually settle on Exhibit, you should end up with just Danube Crested Newt. Now go and turn off each individual biome slowly. One would expect the Newt to disappear and never come back, but instead it pops in and out of existence. Something quirky is happening and you may wish to review the logics.
The industry by and large have moved on to containers, with docker being the entry point and eventually graduating to something larger and more orchestrated like k8s.
You’d generally use a publisher container (I.e. php:latest), and then volume mount your code into it for development, and eventually baking your own image for deployment. Be mindful to not include secrets (API keys, passwords, etc.) and inject them via environment variables.