default.json

位置：/etc/onlyoffice/documentserver/default.json

操作实例：
首先将default.json拷贝出来

[root@localhost engineercms]# docker cp 826:/etc/onlyoffice/documentserver/default.json /usr/src/engineercms
                                               Successfully copied 18.9kB to /usr/src/engineercms

替换为50*1024*1024=524288000

"services": {
        "CoAuthoring": {
            "server": {
                "port": 8000,
                "workerpercpu": 1,
                "mode": "development",
                "limits_tempfile_upload": 524288000,
                "limits_image_size": 26214400,
                "limits_image_download_timeout": {
                    "connectionAndInactivity": "2m",
                    "wholeCycle": "2m"
…………………………
    "FileConverter": {
        "converter": {
            "maxDownloadBytes": 524288000,
            "downloadTimeout": {
                "connectionAndInactivity": "2m",
                "wholeCycle": "2m"
            },
…………………………
            "inputLimits": [
                {
                "type": "docx;dotx;docm;dotm",
                "zip": {
                    "uncompressed": "500MB",
                    "template": "*.xml"
                }
                },
                {
                "type": "xlsx;xltx;xlsm;xltm",
                "zip": {
                    "uncompressed": "500MB",
                    "template": "*.xml"
                }
                },
                {
                "type": "pptx;ppsx;potx;pptm;ppsm;potm",
                "zip": {
                    "uncompressed": "500MB",
                    "template": "*.xml"
                }
                }

再拷回容器内

[root@localhost engineercms]# docker cp /usr/src/engineercms/default.json 826:/etc/onlyoffice/documentserver/
                                             Successfully copied 18.9kB to 826:/etc/onlyoffice/documentserver/
重启容器
docker restart 826

或者这样操作：
在容器内复制以下脚本执行

sed -i -e 's/104857600/10485760000/g' /etc/onlyoffice/documentserver/default.json
sed -i -e 's/50MB/5000MB/g' /etc/onlyoffice/documentserver/default.json
sed -i -e 's/300MB/3000MB/g' /etc/onlyoffice/documentserver/default.json