Github Action error every step must define a `uses` or `run` key - github

Question

I couldn't make this workflow work, I'm always receiving this error every step must define a "uses" or "run" key, but looking at my script I don't see any issues, can someone pls help me fix this? It does not seem like a - problem as it usually is.
# This is a basic workflow to help you get started with Actions
name: Build Digital Ocean Image
# Controls when the workflow will run
on:
# Triggers the workflow on push or pull request events but only for the "master" branch
push:
branches:
- '*'
- '*/*'
- '**'
- '!master'
pull_request:
branches: [ "master" ]
# Allows you to run this workflow manually from the Actions tab
workflow_dispatch:
# A workflow run is made up of one or more jobs that can run sequentially or in parallel
jobs:
packages:
runs-on: ubuntu-latest
steps:
- name: Install packages
run: |
apt-get install curl -y
curl -fsSL https://apt.releases.hashicorp.com/gpg | sudo apt-key add -
sudo apt-add-repository "deb [arch=amd64] https://apt.releases.hashicorp.com $(lsb_release -cs) main"
sudo apt-get update && sudo apt-get install packer
apt-get install ansible -y
# This workflow contains a single job called "build"
build:
# The type of runner that the job will run on
# runs-on: ubuntu-latest
# Steps represent a sequence of tasks that will be executed as part of the job
steps:
# Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
- name: Checkout
uses: actions/checkout#v3
# Runs a single command using the runners shell
- name: Packer init
env:
DIGITALOCEAN_TOKEN=${{ secrets.DIGITALOCEAN_TOKEN }}
run: packer init
working-directory: /home/runner/work/packer-do-custom-images/demo
# Runs a set of commands using the runners shell
- name: Packer build
run: packer build .
working-directory: /home/runner/work/packer-do-custom-images/demo

Answer 1

The runs-on directive is missing (commented!), just add/uncomment it after the name, like:
# This workflow contains a single job called "build"
build:
# The type of runner that the job will run on
runs-on: ubuntu-latest
# Steps represent a sequence of tasks that will be executed as part of the job
steps:
To fix the issue.
I would suggest to use the actionlint tool to discover error like this, as example:
> actionlint .github/workflows/test.yaml
.github/workflows/test.yaml:35:3: "runs-on" section is missing in job "build" [syntax-check]
|
35 | build:
| ^~~~~~
UPDATE:
As side notes also the env variable as issue: you should use : instead of = like:
- name: Packer init
env:
DIGITALOCEAN_TOKEN: ${{ secrets.DIGITALOCEAN_TOKEN }}