Add SOPS encryption for env files

(and decryption with SwarmCD)

.pre-commit-sops.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 for filename in "$@"; do
-    if [[ "${filename}" =~ values.ya?ml$ ]] || [[ "${filename}" =~ secrets?.ya?ml$ ]]; then
+    if [[ "${filename}" =~ values.ya?ml$ ]] || [[ "${filename}" =~ secrets?.ya?ml$ ]] || [[ "${filename}" =~ .env$ ]]; then
         sops -e -i "${filename}"
         git add "${filename}"
     fi