please help me so that my yml file works with no error

version: "2"

services:
redis:
restart: unless-stopped
container_name: test_redis
image: redis:6.2
command:
- --loglevel warning
volumes:
- ./git_files/gitlab/redis:/data:Z
networks:
- net1
- net2

postgresql:
restart: unless-stopped
container_name: test_postgresql
image: sameersbn/postgresql:12-20200524
volumes:
- ./git_files/gitlab/postgresql:/var/lib/postgresql:Z
environment:
- DB_USER=gitlabu
- DB_PASS=4gituser
- DB_NAME=gitlabhq_production
- DB_EXTENSION=pg_trgm,btree_gist
networks:
- net1
- net2
gitlab:
restart: unless-stopped
container_name: test_gitlab
image: sameersbn/gitlab:14.1.1
depends_on:
- redis
- postgresql
ports:
- "10083:80"
- "10023:22"
volumes:
- ./git_files/gitlab/gitlab:/home/git/data:Z
healthcheck:
test: ["CMD", "/usr/local/sbin/healthcheck"]
interval: 5m
timeout: 10s
retries: 3
start_period: 5m
environment:
- DEBUG=false
- DB_ADAPTER=postgresql
- DB_HOST=postgresql
- DB_PORT=5432
- DB_USER=gitlabu
- DB_PASS=pass
- DB_NAME=gitlabhq_production
- REDIS_HOST=redis
- REDIS_PORT=6379
- TZ=Eastern/Africa
- GITLAB_TIMEZONE=Eastern/Africa
- GITLAB_HTTPS=true
- SSL_SELF_SIGNED=true
- GITLAB_HOST=example.com
- - GITLAB_PORT=10080
- GITLAB_SSH_PORT=10022
- GITLAB_SECRETS_DB_KEY_BASE=LvqCsjgNzuIuvbHDp8uCWAIkaeDDh6fwzfGXe35xMB2xIIPwtgFySK0klhL6WhEq
- GITLAB_SECRETS_SECRET_KEY_BASE=4yUYr0it1j9Szd6U5iUC4eEOUYEBzb0DiI0Go40F0cXp6Jdl5OVUAl7i64RuCUkA
- GITLAB_SECRETS_OTP_KEY_BASE=eunP8I8jsoitVx14nJp0BRcicHLMDk6zrqESHmYPkeaTLIOaUqP8ZEO8axZf3nqh
- GITLAB_ROOT_PASSWORD=pass
- GITLAB_ROOT_EMAIL=email@gmail.com
- VIRTUAL_HOST=example.com
- VIRTUAL_NETWORK=net1
- VIRTUAL_PORT=80
- LETSENCRYPT_HOST=example.com
- LETSENCRYPT_EMAIL=email@gmail.com
networks:
- net1
- net2
networks:
net1:
external:
name: net1
net2:
external:
name: net2

Start by validating the provided YAML as a Docker Compose configuration and inspect the exact parser or startup error. Review the service environment entries and network definitions shown in the issue. Done means the configuration validates and the listed Redis, PostgreSQL, and GitLab services start without the reported error.