Name	Value	Example
STEAMCMD_DIR	Folder for SteamCMD	/serverdata/steamcmd
SERVER_DIR	Folder for gamefile	/serverdata/serverfiles
GAME_ID	The GAME_ID that the container downloads at startup.	896660
SRV_NAME	Name of the Server	Valheim Docker
WORLD_NAME	Name of the Server World	Dedicated
SRV_PWD	Server Password - ATTENTION: the minimum length is 6 characters!	Docker
PUBLIC	List Server as Public (set to '0' to disable or set to '1' to enable).	1
ENABLE_VALHEIMPLUS	If you want to enable ValheimPlus set this variable to 'true' (without quotes). For more help please refer to this site: Click	false
ENABLE_BEPINEX	If you want to enable BepInEx for Valheim set this variable to 'true' (without quotes). For more help please refer to this site: Click	false
BACKUP_FILES	Set this value to 'true' to enable the automated backup function from the container, you find the Backups in '.../valheim/Backups/'. Set to 'false' to disable the backup function.	true
BACKUP_INTERVAL	The backup interval in minutes (set to 62 minutes because the game automatically saves the database every 30 minutes) ATTENTION: The first backup will be triggered after the set interval in this variable after the start/restart of the container).	62
BACKUP_TO_KEEP	Number of backups to keep (by default set to 24 to keep the last backups of the last 24 hours).	24
UPDATE_CHECK	If set to 'true' the container will automatically check every 60 minuts if there is an update available and restart the container if a update is found (please keep in mind if you enable the auto update function the container will automatically restart if a newer version is found, set to 'false' to disable the update check).	false
UID	User Identifier	99
GID	Group Identifier	100
GAME_PORT	Only change if you know what you are doing (intital GAME_PORT - Dont forget to create create a new UDP port mapping with the corresponding port range and delete the default port range - GAME_PORT +2)	2456
VALIDATE	Validates the game data	true
USERNAME	Leave blank for anonymous login	blank
PASSWRD	Leave blank for anonymous login	blank

Run example

docker run --name Valheim -d \
	-p 2456-2458:2456-2458/udp \
	--env 'GAME_ID=896660' \
	--env 'SRV_NAME=Valheim Docker' \
	--env 'WORLD_NAME=Dedicated' \
	--env 'SRV_PWD=Docker' \
	--env 'UID=99' \
	--env 'GID=100' \
	--volume /path/to/steamcmd:/serverdata/steamcmd \
	--volume /path/to/valheim:/serverdata/serverfiles \
	ich777/steamcmd:valheim

This Docker was mainly edited for better use with Unraid, if you don't use Unraid you should definitely try it!

This Docker is forked from mattieserver, thank you for this wonderfull Docker.