Docker image versioning

[jordanpotter]

Thanks to @bobbypage's help, we were able to remove the need to run the container in privileged mode! The README and jordanpotter/wireguard Docker Hub description have been updated with the new instructions.

Removing the requirement to run in privileged mode is a huge improvement for security (privileged mode is dangerous), however getting this to work introduced a backwards incompatible change. So...

From now on, the jordanpotter/wireguard Docker image is versioned. It is highly recommended to specify a version when using this image. The available image versions can be found here.

(Note: if for some reason you want to use the previous image that required --privileged to run, you can use jordanpotter/wireguard:0.1.0).

Now for an apology:

I originally built this Docker image for my own personal needs. I shared it with the community because I felt others could benefit from it, but was honestly surprised this image grew in popularity on Docker Hub so quickly! It's been exciting to see!

However in hindsight, this image should have had versioning from the very beginning. Only having latest means consumers will be surprised by backwards incompatible changes, even when they're made for the better.

I apologize to anyone that has been negatively impacted by the lack of versioning on this Docker image. Versioning has now been added so you'll have a stable image that you can rely on.