Nodejs application not connecting Redis in docker-compose - node.js

Question

I have a Nodejs application which connects to a Redis instance. I am using docker-compose for the setup, and running docker-compose up. Here is my docker-compose.yml file:
# Specify docker-compose version.
version: '3'
# Define the services/containers to be run.
services:
express:
build: .
container_name: node-app
ports:
- '8000:8000'
depends_on:
- redis-cache
redis-cache:
image: redis
ports:
- 6379:6379
My Dockerfile:
FROM node:12-alpine
WORKDIR /app
COPY . .
RUN npm ci
EXPOSE 8000
CMD [ “npm”, “start” ] // Also tried CMD [ “node”, “index.js” ]
I am getting the following error:
redis-cache_1 | 1:M 19 Jan 2021 04:23:49.411 * Ready to accept connections
node-app | sh: “start”: unknown operand
node-app exited with code 2
So, I went inside the container and manually ran npm start. The Nodejs started successfully but gave the following error while connecting Redis:
Error: Redis connection to redis-cache:6379 failed - getaddrinfo ENOTFOUND redis-cache
at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:66:26) {
errno: 'ENOTFOUND',
code: 'ENOTFOUND',
syscall: 'getaddrinfo',
hostname: 'redis-cache'
}
Also tried node index.js but still got the same error. This is how I am connecting to my Redis instance in my Nodejs application:
const client = redis.createClient({host: 'redis-cache', port: 6379});
I have tried various answers on StackOverflow as well as various other sites, but none works for me. Please help !