Server pack or client pack

Hi, aside from the client side mods, is there really a difference between the two? I plan on using this https://docker-minecraft-server.readthedocs.io/en/latest/types-and-platforms/mod-platforms/auto-curseforge/ but apparently it downloads the client pack instead and I'm afraid it'll differ from the server pack (server configs?)
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Documentation for Minecraft Server on Docker
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