Add all settings

nixos/default.nix

@@ -2,6 +2,7 @@ self: {
   pkgs,
   lib,
   config,
+  options,
   ...
 }:
 with lib; {
@@ -13,11 +14,70 @@ with lib; {
       default = self.packages.${config.nixpkgs.system}.server;
     };
 
-    apiPort = mkOption {
+    settings = {
+      jwtSecret = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = ''
+          The JWT secret to be used by the application. Should be passed through environmentFile,
+          with REGALADE_JWT_SECRET.
+        '';
+      };
+
+      host = mkOption {
+        type = types.str;
+        default = "0.0.0.0";
+        description = "The listen address";
+      };
+
+      port = mkOption {
         type = types.port;
         default = 8085;
       };
 
+      apiAllowed = mkOption {
+        type = types.nullOr types.str;
+        default = null;
+        description = "The CORS Access-Control-Allow-Origin value";
+      };
+
+      databaseUrl = mkOption {
+        type = types.str;
+        default = "postgres://${config.services.regalade.user}/regalade?host=/var/run/postgresql";
+      };
+
+      sqlxLogging = mkEnableOption "logging of all SQL operations";
+
+      oidc = {
+        enable = mkEnableOption "authentication using an OIDC provider";
+
+        url = mkOption {
+          type = types.str;
+          description = "The base URL of the provider (directory where the .well-known is)";
+        };
+
+        id = mkOption {
+          type = types.str;
+          description = "Client ID";
+        };
+
+        secret = mkOption {
+          type = types.nullOr types.str;
+          description = "The environment variable REGALADE_OIDC__SECRET should be preferred";
+        };
+
+        scopes = mkOption {
+          type = types.listOf types.str;
+          default = ["openid" "profile" "email"];
+        };
+
+        domain = mkOption {
+          type = types.str;
+          description = "URL at which to redirect, where the application is deployed";
+        };
+      };
+    };
+
     user = mkOption {
       type = types.str;
       default = "regalade";
@@ -74,12 +134,36 @@ with lib; {
           PrivateMounts = true;
         };
 
-        environment = {
-          REGALADE_DATABASE_URL = "postgres://${cfg.user}/regalade?host=/var/run/postgresql";
-        };
+        environment =
+          {
+            REGALADE_DATABASE_URL = cfg.settings.databaseUrl;
+            REGALADE_JWT_SECRET = cfg.settings.jwtSecret;
+            REGALADE_HOST = cfg.settings.host;
+            REGALADE_PORT = toString cfg.settings.port;
+            REGALADE_API_ALLOWED = cfg.settings.apiAllowed;
+            REGALADE_SQLX_LOGGING =
+              if cfg.settings.sqlxLogging
+              then "true"
+              else "false";
+          }
+          // (
+            if cfg.settings.oidc.enable
+            then let
+              inherit (cfg.settings) oidc;
+            in {
+              REGALADE_OIDC__URL = oidc.url;
+              REGALADE_OIDC__ID = oidc.id;
+              REGALADE_OIDC__SECRET = oidc.secret;
+              REGALADE_OIDC__DOMAIN = oidc.domain;
+              REGALADE_OIDC__SCOPES = lib.strings.concatStringsSep "," oidc.scopes;
+            }
+            else {}
+          );
       };
 
-      services.postgresql = {
+      services.postgresql =
+        mkIf (cfg.settings.databaseUrl == options.services.regalade.settings.databaseUrl.default)
+        {
           ensureUsers = [
             {
               name = cfg.user;