Change mods volume to /home/steam/ror2ds-mods

• The latest version of RoR2DS requires write access to ${STEAMAPPDIR}/Mods/enable_mods.txt, which can halt the server if the mods volume, which is ${STEAMAPPDIR}/mods, is mounted on a read-only directory. Moving the mods volume out of the game data directory may be a better practice.
• Also another minor improvement: When the docker container is reused (e.g. using docker-compose to create container but not docker run), the mods directory ${STEAMAPPDIR}/BepInEx should be cleaned first, to prevent deleted plugins from taking effect again.

Thanks to @mchobbylong for this release!

Wine 5, stop packaging server binaries

Migrate to Wine 5

Now installs the Risk of Rain 2 Server inside the container, allowing us to stop distributing the server binaries and reduce the docker image size from 1.59 GB to 675 MB. (#21)

Custom tags

Now supports passing server tags for discoverability

Mod support

Add mod support (#10)

• add support for mods and R2_ENABLE_MODS flag