No workers satisfying: resource type 'docker-image', platform 'linux'

Hello Guys,

I’m newbie with concourse.
I already tried the quickstart in aws ubuntu18 and it turns out okay (such as basic pipelines and hello world). But, when I try the manual installation which establish db, web and worker node. I tried the hello world tutorial again but I’m stuck with this error “no workers satisfying: resource type ‘docker-image’, platform ‘linux’”.
image
concourse web
–add-local-user test:test
–main-team-local-user test
–session-signing-key ~/keys/session_signing_key
–tsa-host-key ~/keys/tsa_host_key
–tsa-authorized-keys ~/keys/authorized_worker_keys
–external-url “http://MY_SERVER:8080”
–postgres-user=MYUSER
–postgres-password=MYPASS
–postgres-database=MY DB

sudo concourse worker
–work-dir /var/lib/concourse
–tsa-host 127.0.0.1:2222
–tsa-public-key ~/keys/tsa_host_key.pub
–tsa-worker-private-key ~/keys/worker_key
–-garden-dns-proxy-enable

:frowning: