Move docker creation over to devenv

This is not ideal, since devenv is more for creating development
environments, but it works

devenv.yaml

@@ -1,15 +1,10 @@
-# yaml-language-server: $schema=https://devenv.sh/devenv.schema.json
 inputs:
+  mk-shell-bin:
+    url: github:rrbutani/nix-mk-shell-bin
+  nix2container:
+    url: github:nlewo/nix2container
+    inputs:
+      nixpkgs:
+        follows: nixpkgs
   nixpkgs:
     url: github:cachix/devenv-nixpkgs/rolling
-
-# If you're using non-OSS software, you can set allowUnfree to true.
-# allowUnfree: true
-
-# If you're willing to use a package that's vulnerable
-# permittedInsecurePackages:
-#  - "openssl-1.1.1w"
-
-# If you have more than one devenv you can merge them
-#imports:
-# - ./backend