add PostgreSQL to replace SQLite for better LFS upload concurrency

docker-compose.yml

@@ -4,6 +4,11 @@ services:
     container_name: gitea
     environment:
       - TZ=${TZ}
+      - GITEA__database__DB_TYPE=postgres
+      - GITEA__database__HOST=postgres:5432
+      - GITEA__database__NAME=${POSTGRES_DB}
+      - GITEA__database__USER=${POSTGRES_USER}
+      - GITEA__database__PASSWD=${POSTGRES_PASSWORD}
       - GITEA__lfs__START_SERVER=${GITEA__lfs__START_SERVER}
       - GITEA__lfs__PATH=${GITEA__lfs__PATH}
       - GITEA__service__DISABLE_REGISTRATION=${GITEA__service__DISABLE_REGISTRATION}
@@ -17,6 +22,25 @@ services:
     ports:
       - "${HTTP_PORT}:3000"
       - "${SSH_PORT}:22"
+    depends_on:
+      postgres:
+        condition: service_healthy
+
+  postgres:
+    image: postgres:${POSTGRES_VERSION}
+    container_name: postgres
+    environment:
+      POSTGRES_DB: ${POSTGRES_DB}
+      POSTGRES_USER: ${POSTGRES_USER}
+      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
+    restart: always
+    volumes:
+      - ./data/postgres:/var/lib/postgresql/data
+    healthcheck:
+      test: ["CMD", "pg_isready", "-U", "${POSTGRES_USER}"]
+      interval: 5s
+      timeout: 3s
+      retries: 5
 
   caddy:
     image: caddy:2