feat: Implement a core plugin system, integrate flag icon assets, and establish a GitHub release workflow.

.github/workflows/docker-publish.yml

@@ -10,9 +10,9 @@ on:
 
 env:
   # Use docker.io for Docker Hub if empty
-  REGISTRY: docker.io
+  REGISTRY: ghcr.io
   # github.repository as <account>/<repo>
-  IMAGE_NAME: dyzulk/mivo
+  IMAGE_NAME: ${{ github.repository }}
 
 jobs:
   build:
@@ -30,13 +30,21 @@ jobs:
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
-      # Login against a Docker registry except on PR
-      # https://github.com/docker/login-action
+      # Login against GHCR
       - name: Log into registry ${{ env.REGISTRY }}
         if: github.event_name != 'pull_request'
         uses: docker/login-action@v3
         with:
           registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      
+      # Login against Docker Hub (Optional fallback if secrets exist)
+      - name: Log into Docker Hub
+        if: github.event_name != 'pull_request' && secrets.DOCKER_USERNAME != ''
+        uses: docker/login-action@v3
+        with:
+          registry: docker.io
           username: ${{ secrets.DOCKER_USERNAME }}
           password: ${{ secrets.DOCKER_PASSWORD }}
 
@@ -46,13 +54,12 @@ jobs:
         id: meta
         uses: docker/metadata-action@v5
         with:
-          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          images: |
+            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+            docker.io/${{ env.IMAGE_NAME }}
           tags: |
-            # Branch main -> dyzulk/mivo:edge
             type=raw,value=edge,enable={{is_default_branch}}
-            # Tag v1.0.0 -> dyzulk/mivo:1.0.0
             type=ref,event=tag
-            # Tag v1.0.0 -> dyzulk/mivo:latest
             type=raw,value=latest,enable=${{ startsWith(github.ref, 'refs/tags/') }}
 
       # Build and push Docker image with Buildx (don't push on PR)