Add sops and setup sops-nix

We want to store secrets, and due to the shortcomings of git-crypt (not
working, not being able to push to public caches, etc.) we have decided
to use sops.

Change-Id: I9ed38a93879ca5ff4a452e6e8017b500a4d2cbb6
Reviewed-on: https://git.clicks.codes/c/Chimera/NixFiles/+/414
Tested-by: Skyler Grey <minion@clicks.codes>
Reviewed-by: Skyler Grey <minion@clicks.codes>
diff --git a/configure.sh b/configure.sh
new file mode 100755
index 0000000..18c90e7
--- /dev/null
+++ b/configure.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+nix eval -f .sops.nix --apply "(f: f (builtins.getFlake \"nixpkgs\"))" --json > .sops.yaml # regenerate the "yaml" so you can add secrets
\ No newline at end of file