Dockerized Overviewer

config.py

worlds["default"] = "/tmp/server/world/"
worlds["nether"] = "/tmp/server/world_nether/"

renders["default_day"] = {
    "world": "default",
    "title": "Default Day",
    "rendermode": smooth_lighting,
    "dimension": "overworld",
}

renders["default_night"] = {
    "world": "default",
    "title": "Default Night",
    "rendermode": smooth_night,
    "dimension": "overworld",
}

renders["default_nether"] = {
    "world": "nether",
    "title": "Default Nether",
    "rendermode": nether_smooth_lighting,
    "dimension": "nether",
}

# default textures
#texturepath = "/tmp/overviewer/client.jar"
# custom textures
texturepath = "/tmp/textures/ChromaHills-128x-1.15-v1.zip"
outputdir = "/tmp/export/"

generate-maps.sh

#!/bin/bash

# base location
BASE_DIR="$HOME/minecraft"

# location of the world files
SERVER_DIR="$BASE_DIR/papermc"

# location of the generated map files
EXPORT_DIR="$BASE_DIR/overviewer/maps"

# location of optional texture packs
TEXTURE_DIR="$BASE_DIR/overviewer/textures"

# custom config dir
CONFIG_DIR="$BASE_DIR/overviewer/config"

# run the docker image
docker run \
      --rm \
      -v $SERVER_DIR:/tmp/server/:ro \
      -v $EXPORT_DIR/:/tmp/export/:rw \
      -v $TEXTURE_DIR/:/tmp/textures/:ro \
      -v $CONFIG_DIR/:/tmp/config/:ro \
      -it marctv/minecraft-overviewer

Runs a docker container (marctv/minecraft-overviewer) passing in custom config and texture pack.