Add Docker workflow for building and pushing images

[Falci]

The images will be published to ghcr.io and docker hub.

Each new git tag will generate/replace:
Example tag: v1.2.3

• handshake-org/hnsd:latest
• handshake-org/hnsd:1.2.3
• handshake-org/hnsd:1.2
• handshake-org/hnsd:1

Merges to master generates:

• handshake-org/hnsd:edge

[Falci]

Depends on actions/node-versions/pull/160

[rithvikvibhu]

Tested this on my fork and it built good docker images.

Fork: https://github.com/rithvikvibhu/hnsd
Action run: https://github.com/rithvikvibhu/hnsd/actions/runs/6981130248/job/18997657554
Docker image published: https://hub.docker.com/repository/docker/rithvikvibhu/hnsd

And the image works:

docker run --name hnsd -p 5349:5349/udp -p 5350:5350/udp -p 5349:5349/tcp -p 5350:5350/tcp --mount type=bind,src=/tmp/hnsd,dst=/data rithvikvibhu/hnsd:edge -r 0.0.0.0:5350 -n 0.0.0.0:5349 -t -x /data