Add symlink to secrets

More flexibility and less dots in config files.
Implements #65.

morph/grid/production/config.json

 { "publicStoragePort": 8898
-, "ristrettoSigningKeyPath": "../../PrivateStorageSecrets/ristretto.signing-key"
-, "stripeSecretKeyPath": "../../PrivateStorageSecrets/stripe.secret"
+, "ristrettoSigningKeyPath": "./secrets/ristretto.signing-key"
+, "stripeSecretKeyPath": "./secrets/stripe.secret"
 , "passValue": 1000000
 , "issuerDomain": "payments.privatestorage.io"
 , "letsEncryptAdminEmail": "jean-paul@privatestorage.io"

morph/grid/production/grid.nix

@@ -6,7 +6,7 @@ import ../../lib/make-grid.nix {
   config = ./config.json;
   nodes = cfg:
     let
-      sshUsers = import ../../../../PrivateStorageSecrets/production-users.nix;
+      sshUsers = import ./secrets/production-users.nix;
     in {
     # Here are the hosts that are in this morph network.  This is sort of like
     # a server manifest.  We try to keep as many of the specific details as

morph/grid/production/secrets

+../../../../PrivateStorageSecrets/
\ No newline at end of file

morph/grid/testing/config.json

 { "publicStoragePort": 8898
-, "ristrettoSigningKeyPath": "../../PrivateStorageSecrets/ristretto.signing-key"
-, "stripeSecretKeyPath": "../../PrivateStorageSecrets/privatestorageio-testing-stripe.secret"
+, "ristrettoSigningKeyPath": "./secrets/ristretto.signing-key"
+, "stripeSecretKeyPath": "./secrets/privatestorageio-testing-stripe.secret"
 , "passValue": 1000000
 , "issuerDomain": "payments.privatestorage-staging.com"
 , "letsEncryptAdminEmail": "jean-paul@privatestorage.io"

morph/grid/testing/grid.nix

@@ -11,7 +11,7 @@ import ../../lib/make-grid.nix {
       then import path
       else default
     );
-    sshUsers = importDef {} ../../../../PrivateStorageSecrets/staging-users.nix;
+    sshUsers = importDef {} ./secrets/staging-users.nix;
   in {
     "payments" = import ../../lib/make-issuer.nix ({
       publicIPv4 = "18.197.42.120";

morph/grid/testing/secrets

+../../../../PrivateStorageSecrets/
\ No newline at end of file