diff --git a/.env.example b/.env.example
index c304264..c9e5984 100644
--- a/.env.example
+++ b/.env.example
@@ -5,5 +5,8 @@ DATABASE_URL=postgres://greact:pG3526l4@194.36.208.86:5433/cloud
 # Optional. When set, POST /api/ingest requires x-api-key: <value>.
 INGEST_API_KEY=
 
+# Optional. Logs POST /api/ingest request metadata without x-api-key.
+INGEST_DEBUG_LOG=
+
 # Poll interval for GET /api/current/events SSE snapshots.
 CURRENT_EVENTS_POLL_MS=1000
diff --git a/docker-compose.yml b/docker-compose.yml
index a231116..4fe08ad 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -5,6 +5,7 @@ services:
     restart: unless-stopped
     environment:
       NODE_ENV: production
+      BRANCH: ${branch:-}
       PORT: ${PORT}
       DATABASE_URL: ${DATABASE_URL}
       INGEST_API_KEY: ${INGEST_API_KEY}
diff --git a/src/main.ts b/src/main.ts
index d3efa04..eafb9ba 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,10 +1,30 @@
-import { ValidationPipe } from '@nestjs/common';
+import { Logger, ValidationPipe } from '@nestjs/common';
 import { NestFactory } from '@nestjs/core';
 import compression from 'compression';
 import { AppModule } from './app.module';
+import { DbService } from './db/db.service';
+
+type CurrentDatabaseRow = {
+  database: string;
+};
+
+function getMaskedDatabaseUrl(): string | undefined {
+  const databaseUrl = process.env.DATABASE_URL;
+  if (!databaseUrl) {
+    return undefined;
+  }
+
+  try {
+    const url = new URL(databaseUrl);
+    const username = url.username ? `${url.username}:***@` : '';
+    return `${url.protocol}//${username}${url.host}${url.pathname}`;
+  } catch {
+    return databaseUrl.replace(/:\/\/([^:]+):([^@]+)@/, '://$1:***@');
+  }
+}
 
-/** Запускает HTTP API со сжатием и глобальной валидацией DTO. */
 async function bootstrap() {
+  const logger = new Logger('Bootstrap');
   const app = await NestFactory.create(AppModule);
   app.use(compression());
   app.setGlobalPrefix('api');
@@ -18,6 +38,20 @@ async function bootstrap() {
   );
 
   await app.listen(process.env.PORT as string);
+
+  const db = app.get(DbService);
+  const currentDatabase = await db.query<CurrentDatabaseRow>(
+    'SELECT current_database() AS database',
+  );
+
+  logger.log({
+    event: 'cloud.started',
+    port: process.env.PORT,
+    branch: process.env.BRANCH ?? process.env.branch ?? '',
+    database: currentDatabase.rows[0]?.database,
+    databaseUrl: getMaskedDatabaseUrl(),
+    ingestDebugLog: process.env.INGEST_DEBUG_LOG ?? '',
+  });
 }
 
 void bootstrap();