Self-host Halo

copy# Halo 2 community edition (halohub/halo) with PostgreSQL, per the docs' Docker Compose guide (the docs' example uses the halo-pro image)
mkdir -p halo && cd halo
echo "DB_PASS=$(openssl rand -hex 16)" > .env
cat > docker-compose.yml <<'EOF'
services:
  halo:
    image: halohub/halo:2.26
    restart: on-failure:3
    depends_on:
      halodb: { condition: service_healthy }
    ports: ["8090:8090"]
    volumes: ["./halo2:/root/.halo2"]
    environment:
      - JVM_OPTS=-Xmx256m -Xms256m
    command:
      - --spring.r2dbc.url=r2dbc:pool:postgresql://halodb/halo
      - --spring.r2dbc.username=halo
      - --spring.r2dbc.password=${DB_PASS}
      - --spring.sql.init.platform=postgresql
      - --halo.external-url=http://SERVER_IP:8090/
  halodb:
    image: postgres:15.4
    restart: on-failure:3
    volumes: ["./db:/var/lib/postgresql/data"]
    healthcheck:
      test: ["CMD", "pg_isready"]
      interval: 10s
      timeout: 5s
      retries: 5
    environment:
      - POSTGRES_PASSWORD=${DB_PASS}
      - POSTGRES_USER=halo
      - POSTGRES_DB=halo
      - PGUSER=halo
EOF
docker compose up -d   #  →  http://SERVER_IP:8090/system/setup  (first visit: site title + admin account)