Converting Hosted Server from Survival to Creative?

Is there any way to change an already created world on a server to creative once generated in survival? I tried using the setting it via CLI in the game but got a error telling me I can't do that. It's a hosted server on my Linux box that I port forwarded and recently we have wanted to just build things while digging when needed as things are getting tedious until other tools and updates roll out. I could just spawn the stuff or blueprint it and paste it in a new world I suppose but I am trying to wait until water is released before I go that route. Any insight would be great, I didn't see anything in the server.properties file that would let me change it over.