Add dev services

- Development dotenvs
- Caddy service
- Redis service
- Postgres service
- Fix env parser error

Signed-off-by: Asai Neko <sugar@sne.moe>

devenv.nix

@@ -1,12 +1,56 @@
-{ pkgs, ... }:
+{ pkgs, config, ... }:
 
 {
   env.GREET = "devenv";
+
   packages = [
     pkgs.git
     pkgs.bun
     pkgs.just
   ];
-  languages.go.enable = true;
-  languages.go.version = "1.25.5";
+
+  dotenv = {
+    enable = true;
+    filename = [
+      ".env.production"
+      ".env.development"
+    ];
+  };
+
+  languages.go = {
+    enable = true;
+    version = "1.25.5";
+  };
+
+  services.caddy = {
+    enable = true;
+    dataDir = "${config.env.DEVENV_STATE}/caddy";
+    config = ''
+      {
+          debug
+      }
+      :8080 {
+          root * ${config.env.DEVENV_ROOT}/.outputs/static
+          file_server
+          reverse_proxy /api/v1/* http://127.0.0.1:8000
+      }
+    '';
+  };
+
+  services.redis = {
+    enable = true;
+  };
+
+  services.postgres = {
+    enable = true;
+    createDatabase = true;
+    listen_addresses = "127.0.0.1";
+    initialDatabases = [
+      {
+        name = "postgres";
+        user = "postgres";
+        pass = "postgres";
+      }
+    ];
+  };
 }