replace Dockerfile build with GHCR image build

Author: nhalstead

.github/workflows/docker-publish.yml

@@ -0,0 +1,44 @@
+name: Publish Docker Image
+
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+  workflow_dispatch:
+
+jobs:
+  push_to_registry:
+    name: Push Docker image to GitHub Packages
+    runs-on: ubuntu-latest
+    permissions:
+      packages: write
+      contents: read
+    steps:
+      - name: Check out the repo
+        uses: actions/checkout@v6
+
+      - name: Log in to GitHub Docker Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ghcr.io/${{ github.repository }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=semver,pattern={{major}}
+            type=sha
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

README.md

@@ -10,6 +10,8 @@ This project uses [`ajv`](https://github.com/epoberezkin/ajv), fast JSON schema
 
 ## Usage
 
+To use this GitHub Action, you can reference it in your workflow. For faster validation, this action uses a pre-built Docker image from the GitHub Container Registry (GHCR).
+
 ### Inputs
 
 - `schema`: Relative file path in the repository to a JSON schema file to validate the other JSON files with. If no value is provided `./schema.json` will be used.
@@ -34,7 +36,7 @@ jobs:
     steps:
       - uses: actions/checkout@v1
       - name: Validate JSON with Glob
-        uses: nhalstead/validate-json-action@0.1.8
+        uses: nhalstead/validate-json-action@v0.1.9
         with:
           schema: /path/to/schema.json
           jsons: /path/to/file.json,/path/to/another/file.json

action.yml

@@ -14,7 +14,7 @@ outputs:
     description: 'One or more of relative file paths of the invalid JSON files, found in the repository (separated by comma).'
 runs:
   using: 'docker'
-  image: 'Dockerfile'
+  image: 'docker://ghcr.io/nhalstead/validate-json-action:v0.1.9'
 branding: 
   icon: 'check'
   color: purple