version: '3.1'
services:
    couchdb:
        image: couchdb
        container_name: my-db
        ports:
            - 5984:5984
        environment:
            COUCHDB_USER: admin
            COUCHDB_PASSWORD: password
    api:
       image: my-api
       container_name: my-api
       build: .
       command: npm run dev
       ports:
           - 8080:8080
       depends_on:
           - couchdb
       links:
           - couchdb

Error: connect ECONNREFUSED 172.19.0.2:5984
    at Object._errnoException (util.js:1003:13)
    at _exceptionWithHostPort (util.js:1024:20)
    at TCPConnectWrap.afterConnect [as oncomplete] (net.js:1195:14)

version: '3.1'
services:
    couchdb:
        image: couchdb
    container_name: my-db
    ports:
        - 5984:5984
    environment:
        COUCHDB_USER: admin
        COUCHDB_PASSWORD: password
api:
    image: my-api
    container_name: my-api
    build: .
    command: npm run dev
    ports:
        - 8080:8080
    depends_on:
        - couchdb
    links:
        - couchdb
    environment:
        DB_URL: http://admin:password@couchdb