ops(feat): deploy to ghcr

.github/workflows/publish.yml

@@ -0,0 +1,33 @@
+name: Build and Publish Docker Image
+
+on:
+  push:
+    branches:
+      - main
+    tags:
+      - '*'
+
+jobs:
+  build-and-publish:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - uses: docker/login-action@v1
+      with:
+        registry: ghcr.io
+        username: ${{ github.repository_owner }}
+        password: ${{ secrets.GITHUB_TOKEN }}
+    - name: Get tag version
+      id: prep
+      run: |
+        if [[ $GITHUB_REF == refs/heads/main ]]; then
+          echo "::set-output name=version::latest"
+        else
+          echo "::set-output name=version::${GITHUB_REF#refs/tags/}"
+        fi
+    - uses: docker/build-push-action@v2
+      with:
+        context: .
+        file: Dockerfile
+        push: true
+        tags: ghcr.io/${{ github.repository_owner }}/url-to-png:${{ steps.prep.outputs.version }}

README.md

@@ -12,7 +12,7 @@ A URL to PNG generator over HTTP with a fairly simple API accessed via query par
 Run the following command:
 
 ```
-docker run --rm -p 3000:3000 jasonraimondi/url-to-png
+docker run --rm -p 3000:3000 ghcr.io/jasonraimondi/url-to-png
 ```
 
 On the hub: [Link to DockerHub](https://hub.docker.com/r/jasonraimondi/url-to-png/)