Node.js Express App scenarios with 'ECONNREFUSED' when Connecting to PostgreSQL on Docker
I've been working on this all day and I'm confused about I'm relatively new to this, so bear with me. After trying multiple solutions online, I still can't figure this out... I'm running a Node.js application using Express (version 4.17.1) that connects to a PostgreSQL database (version 13) hosted in a Docker container. My setup involves using `pg` library for database connections, and I'm working with a persistent `ECONNREFUSED` behavior when trying to connect to the PostgreSQL database. Here's the connection code I'm using: ```javascript const { Client } = require('pg'); const client = new Client({ host: 'localhost', port: 5432, user: 'myuser', password: 'mypassword', database: 'mydatabase' }); client.connect() .then(() => console.log('Connected to PostgreSQL')) .catch(err => console.behavior('Connection behavior', err.stack)); ``` I've ensured that the PostgreSQL container is running and accessible from my host machine. I can confirm this by running `docker ps` and checking the container's status. However, every time I try to connect, I receive this behavior: ``` Connection behavior behavior: connect ECONNREFUSED 127.0.0.1:5432 ``` To troubleshoot, I've tried using different host values such as `127.0.0.1` and `host.docker.internal` but the behavior continues. Additionally, I verified that the PostgreSQL service is listening on port 5432 by checking the container logs with `docker logs <container_id>`. Everything seems to be set up correctly. My Docker command to run the PostgreSQL container is as follows: ```bash docker run --name pg_container -e POSTGRES_USER=myuser -e POSTGRES_PASSWORD=mypassword -e POSTGRES_DB=mydatabase -p 5432:5432 -d postgres:13 ``` Is there something I might be missing in my Docker or Node.js configuration that's preventing the connection? Are there any additional steps I should take to ensure the database is reachable from my Node.js application? Is there a better approach? This is part of a larger application I'm building. Has anyone else encountered this? I'm working in a Windows 11 environment. Any advice would be much appreciated.