perf: migrate DB of linkding from sqlite to postgres

files/docker/rss/docker-stack.yaml

@@ -4,6 +4,7 @@ networks:
 
 volumes:
   linkding_data:
+  linkding_db:
   miniflux_db:
 
 services:
@@ -113,6 +114,11 @@ services:
 
       LD_CSRF_TRUSTED_ORIGINS: https://bookmarks.alecodes.page
 
+      LD_DB_HOST: tasks.linkding_db
+      LD_DB_ENGINE: postgres
+      LD_DB_DATABASE: linkding
+      LD_DB_USER: linkding
+      LD_DB_PASSWORD: ${LD_DB_PASSWORD}
     deploy:
       rollback_config:
         failure_action: continue
@@ -127,3 +133,26 @@ services:
         - traefik.enable=true
         - traefik.http.routers.linkding.rule=Host(`bookmarks.alecodes.page`)
         - traefik.http.services.linkding.loadbalancer.server.port=9090
+
+  linkding_db:
+    image: postgres:latest
+    environment:
+      POSTGRES_USER: linkding
+      POSTGRES_PASSWORD: ${LD_DB_PASSWORD}
+      POSTGRES_DB: linkding
+    volumes:
+      - linkding_db:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD", "pg_isready", "-U", "linkding"]
+      interval: 10s
+      start_period: 30s
+    deploy:
+      rollback_config:
+        failure_action: continue
+      update_config:
+        delay: 2s
+        failure_action: rollback
+        order: start-first
+      placement:
+        constraints:
+          - node.labels.services_kind==${SERVICE_KIND:-common}