Use Docker image instead of building on each action run (#34)

Author: zefir-git

.github/workflows/publish.yaml

@@ -0,0 +1,34 @@
+name: Publish
+
+on:
+  push:
+    tags: [v*]
+
+permissions:
+  packages: write
+
+env:
+  IMAGE_NAME: modrinth-publish
+
+jobs:
+  publish:
+    name: Publish
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Build image
+        run: docker build . --file Dockerfile --tag $IMAGE_NAME --label "runnumber=${GITHUB_RUN_ID}"
+
+      - name: Log in to GitHub Container Registry
+        run: echo "${{ github.token }}" | docker login ghcr.io -u ${{ github.actor }} --password-stdin
+
+      - name: Push image
+        run: |
+          IMAGE_ID=ghcr.io/${{ github.repository_owner }}/$IMAGE_NAME
+          IMAGE_ID=$(echo $IMAGE_ID | tr '[A-Z]' '[a-z]')
+          TAG=${GITHUB_REF#refs/tags/}
+          VERSION=${TAG#v}
+          docker tag $IMAGE_NAME $IMAGE_ID:$VERSION
+          docker push $IMAGE_ID:$VERSION

action.yaml

@@ -55,7 +55,7 @@ outputs:
     description: Version ID generated by Modrinth.
 runs:
   using: docker
-  image: Dockerfile
+  image: docker://ghcr.io/cloudnode-pro/modrinth-publish:2.0.0
   env:
     GH_INPUTS: ${{ toJSON(inputs) }}
 branding: