Remove sandbox=false from nix + migrate to Github Actions

   Ismaël B   11 Remove sandbox=false
   Ismaël B   12 Use github action
   Ismaël B   13 Fix github action

Upgrade Nix to 2.3.4

This is an upgrade of Nix to 2.3.4

The release also includes a better management of the /nix path as a volume and avoids duplicating the entire nix store.

Add possibility to mount /nix as a volume

Merge pull request #7 from paulrbr-fl/nix-store-as-a-volym

volume: change base images to be able to mount /nix/store as volume

2.3.1-channel-19.09: Merge pull request #6 from paulrbr-fl/upgrade-nix

Upgrade: nix to latest v2.3.1 and upgrade channel to stable 19.09

2.2.1-channel-19.03: Merge pull request #5 from haitlahcen/upgrade-19.03

Upgrade from 18.09 to 19.03

2.1.3-2: Merge pull request #4 from haitlahcen/stable-nixpkgs

fix: pin unstable nixpkgs to latest stable release (18.09)

Adding a Debian based image

Now the image is available in both alpine and debian os