Need Help with serverconfig.json settings

[Neo-Gambit]

I'm trying to copy the format from the official wiki to edit some of the "WorldConfiguration" parameters, but every time I edit it, the server fails to load, and completely wipes out the serverconfig.json except for a few lines.  I tried to copy all the brackets and commas according to the wiki, but since I'm not a coder - I have no idea what I'm doing wrong.  Any guidance would be appreciated, thank you.

Here's the relevant entries I'm trying to modify that are causing the problem.

"WorldConfig": {
    "Seed": null,
    "SaveFileLocation": "./data/Saves/default.vcdbs",
    "WorldName": "Githalla",
    "AllowCreativeMode": true,
    "PlayStyle": "surviveandbuild",
    "PlayStyleLangCode": "surviveandbuild-bands",
    "WorldType": "standard",
    "WorldConfiguration": { 
        "deathPunishment": "keep",
        "daysPerMonth": 30,
        "harshWinters": false,
        "creatureHostility": "passive",
        "playerHealthPoints": 100,
        "toolDurability": 5,
    },
    "MapSizeY": null,
    "CreatedByPlayerName": null,
    "DisabledMods": null,
    "RepairMode": false
    
  },

[Streetwind]

Welcome to the forums!

I've heard it recommended to create a singleplayer world with your desired settings and then copy that world onto your server. That saves you the need to fiddle with json files.

[LewZephyr]

Exactly what @Streetwind said.

Start a single player game make all the tweaks you want start up the session.  Exit and then copy the json from that and put it on your server.

[jabes]

I copied the single player tweaked .json file to my multiplayer server host's /data/serverconfig.json folder and my server failed to load. Does this method work on a multiplayer server that has already been played on? 

[Nomad-555]

Same my server fails to boot up when I copied the save world and json file. But when I only copy the single player world it seems to boot up and have a higher world height, I am still figuring out if I wasted time because I want more ores to spawn the in the world be increasing ore generation rate(which the prospecting pickaxe hasn't really shown a big increase yet...)