feat: add Docker support with demo mode and database reset functionality

scripts/prepare-container.ts

@@ -0,0 +1,45 @@
+// SPDX-FileCopyrightText: 2026 Paul Schoeneck
+//
+// SPDX-License-Identifier: AGPL-3.0-only AND LicenseRef-KIBU-Additional-Terms
+
+import { spawnSync } from "node:child_process";
+import { createRequire } from "node:module";
+import { fileURLToPath } from "node:url";
+import { demoLogin, isDemoDatabase } from "../src/lib/demo";
+
+function prepare() {
+  if (!process.env.DATABASE_URL) throw new Error("DATABASE_URL fehlt.");
+  if (process.env.DEMO_MODE && !["true", "false"].includes(process.env.DEMO_MODE)) {
+    throw new Error("DEMO_MODE muss true oder false sein.");
+  }
+  const demo = demoLogin();
+  if (demo) {
+    const target = new URL(process.env.DATABASE_URL);
+    if (!isDemoDatabase(target) || !["postgres:", "postgresql:"].includes(target.protocol)) {
+      throw new Error("Demo-Start erfordert DEMO_RESET_ON_START=true und die separate Datenbank demo-db/kibu_demo. Nichts wurde veraendert.");
+    }
+    process.env.BOOTSTRAP_EMAIL = demo.email;
+    process.env.BOOTSTRAP_PASSWORD = demo.password;
+    console.log("DEMOMODUS: Gemeinsamer oeffentlicher Zugang; alle Demodaten werden bei jedem App-Start ersetzt.");
+  } else if (process.env.DEMO_RESET_ON_START === "true") {
+    throw new Error("DEMO_RESET_ON_START erfordert DEMO_MODE=true.");
+  }
+  const tsx = createRequire(import.meta.url).resolve("tsx/cli");
+  const commands = demo
+    ? [["setup.ts"], ["reset-instance.ts", "demo", "--confirm-reset"]]
+    : [["setup.ts"]];
+  for (const [script, ...args] of commands) {
+    const result = spawnSync(process.execPath, [tsx, fileURLToPath(new URL(script, import.meta.url)), ...args], {
+      env: process.env, stdio: "inherit",
+    });
+    if (result.error) throw result.error;
+    if (result.status !== 0) throw new Error(`${script} fehlgeschlagen; App wird nicht gestartet.`);
+  }
+}
+
+try {
+  prepare();
+} catch (error) {
+  console.error("Container-Vorbereitung fehlgeschlagen:", error);
+  process.exitCode = 1;
+}