Deploying Angular App to Firebase Hosting Github Actions

I'm trying to use Github actions to deploy my Angular app to Firebase hosting. I'm using this action in order to accomplish this. My release.yml file looks like the following:

name: Release
on:
push:
branches:
- master

jobs:
firebase-deploy:
runs-on: ubuntu-latest

steps:
- uses: actions/checkout@master
- uses: actions/setup-node@master
with:
node-version: '14.x'
- run: npm install
- run: npm run build --prod
- uses: w9jds/firebase-action@master
with:
args: deploy --only hosting
env:
FIREBASE_TOKEN: ${{ secrets.FIREBASE_TOKEN }}



However when I commit this onto the master branch, I get the following error:

Error: Must supply either "site" or "target" in each "hosting" config.
​

I have no clue what this error means, so any help would be great. Thanks!


Edit: My firebase.json looks like the following:

{
"hosting": [
{
"public": "MyName",
"ignore": [
"firebase.json",
"**/.*",
"**/node_modules/**"
],
"rewrites": [
{
"source": "**",
"destination": "/index.html"
}
]
},
{
"target": "projectName",
"public": "dist/projectName",
"ignore": [
"firebase.json",
"**/.*",
"**/node_modules/**"
],
"rewrites": [
{
"source": "**",
"destination": "/index.html"
}
]
}
]
}

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