Spring Boot cannot connect to PostgreSQL in Docker

I’m having a persistent issue with Spring Boot 3.5.15 connecting to PostgreSQL 16 running in Docker. I keep getting: FATAL: password authentication failed for user “attendance” What I’ve tried: Docker container runs with correct environment variables: docker run –name postgres -e POSTGRES_USER=attendance -e POSTGRES_PASSWORD=attendance -e POSTGRES_DB=attendance -p 5432:5432 -d postgres:16 I can connect successfully from command line: docker exec -it postgres psql -U attendance -d attendance # Shows: attendance=# User exists in database: SELECT usename FROM pg_user; – Returns: attendance Envi