Housekeeping

- Update README
- Run shellcheck on .sh files
- Add helper scripts
- Remove eirene vm variant
- Add post-install checklist

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

scripts/update-keys.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+if [[ "$#" -ne 1 ]]; then
+  echo "Usage: $0 <sops-master-key>"
+  exit 1
+fi
+
+export SOPS_AGE_KEY_FILE="$1"
+
+for SOPS_FILE in $(find . -type f -name 'sops.yaml'); do
+  dir=$(dirname "${SOPS_FILE}")
+  echo "${dir}"
+  find "${dir}" -maxdepth 1 -type f -regextype posix-extended -regex '.+\.(yaml|yml|json|env|ini|bin)' | while read -r file; do
+    echo "${file}"
+    nix shell nixpkgs#sops --command sops --config "${SOPS_FILE}" updatekeys "${file}" -y
+  done
+done