Add browserless service to prod compose and document clean-pdf

docker-compose.prod.yml

@@ -13,9 +13,14 @@ services:
       NEXT_PUBLIC_APP_URL: "https://school.second-brain.ru"
       RESEND_API_KEY: "${RESEND_API_KEY}"
       EMAIL_FROM: "${EMAIL_FROM}"
+      BROWSER_WS_URL: "ws://browserless:3000"
+      BROWSERLESS_TOKEN: "${BROWSERLESS_TOKEN}"
+      PDF_MONTHLY_LIMIT: "${PDF_MONTHLY_LIMIT:-100}"
     depends_on:
       db:
         condition: service_healthy
+      browserless:
+        condition: service_started
 
   db:
     image: postgres:16-alpine
@@ -32,5 +37,15 @@ services:
       timeout: 5s
       retries: 10
 
+  browserless:
+    image: ghcr.io/browserless/chromium
+    restart: unless-stopped
+    environment:
+      TOKEN: "${BROWSERLESS_TOKEN}"
+      CONCURRENT: "2"
+      QUEUED: "10"
+      TIMEOUT: "120000"
+    mem_limit: 1g
+
 volumes:
   postgres_data: