Add sops-secrets, configure oauth

hosts/chapel/services/hedgedoc.nix

@@ -0,0 +1,22 @@
+{ config, pkgs, ... }:
+
+{
+  services.hedgedoc = {
+    enable = true;
+    settings = {
+      port = 3031;
+      allowFreeURL = true;
+    };
+    config = {
+      domain = "md.feal.no";
+      db = {
+        dialect = "mysql";
+        host = "mysql.home.feal.no";
+        port = 3306;
+        database = "hedgedoc";
+        username = "hedgedoc";
+        password = "DummyPasswordPlzSops";
+      };
+    };
+  };
+}