feat: Add an empty secrets file for rpi2

This is related to #10

.sops.yaml

@@ -22,3 +22,7 @@ creation_rules:
           - *thinkrac
         pgp:
           - *lotte
+  - path_regex: secrets/rpi2/[^/]+$
+    key_groups:
+      - pgp:
+          - *lotte

secrets/rpi2/secrets.yaml

@@ -0,0 +1,23 @@
+test: ENC[AES256_GCM,data:bKQdIQ==,iv:8gIzeFQ4S4oyKhUI2DSCHRH8KNxtbdK/NrqucFOBsk4=,tag:4TKayj06ihwk7BaPKYD5yA==,type:str]
+sops:
+    kms: []
+    gcp_kms: []
+    azure_kv: []
+    hc_vault: []
+    age: []
+    lastmodified: "2022-02-26T08:29:12Z"
+    mac: ENC[AES256_GCM,data:oLj0T+wIn4fhJg9/A/yDRZVdfS9FzYr7GAitLgf1lllwYajQazGWUXmLsBOVU4i3hrBvIOF8hfylSJdrNpl8wO1usrZkEPArmciEtE0//pnaSqG+7fNDSrtg32ZWTjHiwbnvD6WxJ0uc3ftgBhbCcdE7O6WeK+qBN95HDtRtB1E=,iv:0UppoBGnh/m0s3O54nbGoj5EOJGXVUNzWjmxnIyHQCc=,tag:qLFvBFdYaC//ilMfp4XRsw==,type:str]
+    pgp:
+        - created_at: "2022-02-26T08:28:49Z"
+          enc: |
+            -----BEGIN PGP MESSAGE-----
+
+            hF4DAAAAAAAAAAASAQdAAn6xyUBJJ9Ted13EUMccOI6uJF4kl1b3c2WXbxsIUH4w
+            2o1fl7kryh+dir4sZjlJn6MumIoFxCKLAGCtSVsnntKx73RCTGfm6wUWGLsalxUK
+            0lwBCbUvEEk0Uf5yoWcFHK1Ayyw9vkR0taxIgefJCTDt73iKvYe9O4ymrKZyHQd6
+            3eZViCGn4FQBn5oVEBUVRX44awq4i0DCeXfG90uxfbYkuro55aQCbDP9U5xmYg==
+            =2T85
+            -----END PGP MESSAGE-----
+          fp: 46C6A7E14BC7812E86C2700737FE303AAC2D06CD
+    unencrypted_suffix: _unencrypted
+    version: 3.7.1