Docker

[hyena]

Creates a Dockerfile for mutgos. Hopefully this will make it easier to build, deploy, and manage dependencies.

To test:

1. Install docker (probably sudo apt install docker.io on Ubuntu)
2. Add your username to the docker group
3. Either completely log out or su $USERNAME (required for the group change to be picked up)
4. Follow the instructions in the readme for building/running:

   docker build -t mutgos .
   docker run -it -p 7072:7072 --name mutgos mutgos

5. Test by telneting to localhost on port 7072

This will take a while since it's basically a full rebuild, but it's worked for me. Some notes and caveats:

• Docker is a confusing technology written by eccentric frenchmen, but it has a ton of momentum. It will have a learning curve so don't be discouraged. Based on my experience the most important command is probably docker system prune -a --volumes which will erase everything when you invariably run out of space and get mad at it.
• There's not a good way right now to move config files over after the docker image is built. Things will be tweaked after that functionality is built.
• While building things I was initially using Angelscript 2.33.0. It was intend incompatible. The main error was of the form ERR ** AngelScript ** #1-25 script (row 56, col 45): No matching signatures to 'array::length()'. Probably pretty minor but I haven't looked into it. The Dockerfile uses 2.32.0 for now.

[zelerin]

While I have not tested this, I will take your word that it works... or at the very least is a good start into integrating with Docker. Thanks for doing this! I suspect it will make things easier for people wishing to get started and that don't want to accidentally mess up their system with newer system libraries.

I will add an issue that states we don't want to keep pulling our dependencies from web site sources; this is because some (like AngelScript) are not big sites and so we don't want to cut into bandwidth limits. I don't have a solution yet, but will welcome suggestions.