Docker for starting onlyoffice documentserver with autoAssembly (coauthoring) value set - see https://api.onlyoffice.com/editors/save#forcesave

onlyoffice-autoassembly.sh

#!/bin/bash
#Requires jq (apt install jq)
imageName=${1?docker documentserver image}
interval=5m
tmpDir=$(mktemp -d)
trap "rm $tmpDir/*; rmdir $tmpDir" EXIT
cat <<EOF >$tmpDir/coauthoring.json
{
    "services": {
        "CoAuthoring": {
            "autoAssembly": {
                "enable": true,
                "interval": "${interval}"
            }
        }
    }
}
EOF
docker cp $imageName:/etc/onlyoffice/documentserver/local.json $tmpDir/local-orig.json
jq -s '.[0] * .[1]' $tmpDir/coauthoring.json $tmpDir/local-orig.json >$tmpDir/local.json
chmod a+r $tmpDir/local.json
docker cp $tmpDir/local.json $imageName:/etc/onlyoffice/documentserver/local.json
docker restart $imageName