forgejo: use redis for caching

hosts/arashi/services/default.nix

@@ -1,5 +1,6 @@
 _: {
   imports = [
     ./postgresql.nix
+    ./redis.nix
   ];
 }

hosts/arashi/services/redis.nix

@@ -1,7 +1,16 @@
-_: {
-  services.redis.servers.default = {
+{...}: {
+  services.redis.servers = {
+    forgejo = {
       enable = true;
       openFirewall = true;
       port = 6379;
+      bind = "100.94.214.100";
+      databases = 16;
+      logLevel = "debug";
+      requirePass = "forgejo";
+      settings = {
+        protected-mode = "no";
+      };
+    };
   };
 }

hosts/sakura/services/forgejo.nix

@@ -36,6 +36,11 @@
         USER = "forgejo";
         PASSWD = "forgejo";
       };
+      cache = {
+        ENABLED = true;
+        ADAPTER = lib.mkForce "redis";
+        HOST = "redis://:forgejo@100.94.214.100:6379";
+      };
       metrics = {
         ENABLED = true;
         ENABLED_ISSUE_BY_REPOSITORY = true;