Create main.yml

Author: trivarialthea

.github/workflows/main.yml

@@ -0,0 +1,20 @@
+name: Build And Upload Docker Image
+
+on: [push]
+
+jobs:
+  publish:
+    runs-on: ubuntu-latest
+    
+    steps:
+    - uses: actions/checkout@v2
+    - name: Login to GitHub Container Registry
+      run: echo "${{ secrets.GITHUB_TOKEN }}" | docker login ghcr.io -u $ --password-stdin  
+    - id: string
+      uses: ASzc/change-string-case-action@v2
+      with:
+        string: ${{ github.repository }}
+    - name: Build the ${{ github.repository }} Docker image
+      run: |
+        docker build . --tag ghcr.io/${{ steps.string.outputs.lowercase }}:latest
+        docker push ghcr.io/${{ steps.string.outputs.lowercase }}:latest