Add a push for image

.github/workflows/astria-cometbft-docker.yml

@@ -0,0 +1,64 @@
+name: Docker
+# Rebuilds the CometBFT docker image on every push to main and creation of tags
+# and pushes the image to https://hub.docker.com/r/cometbft/cometbft
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - astria
+    tags:
+      - "v[0-9]+.[0-9]+.[0-9]+"               # Push events to matching v*, i.e. v1.0, v20.15.10
+      - "v[0-9]+.[0-9]+.[0-9]+-alpha.[0-9]+"  # e.g. v0.37.0-alpha.1, v0.38.0-alpha.10
+      - "v[0-9]+.[0-9]+.[0-9]+-beta.[0-9]+"   # e.g. v0.37.0-beta.1, v0.38.0-beta.10
+      - "v[0-9]+.[0-9]+.[0-9]+-rc[0-9]+"      # e.g. v0.37.0-rc1, v0.38.0-rc10
+  pull_request:
+    branches:
+      'astria'
+
+
+env:
+  REGISTRY: ghcr.io
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    if: ${{ contains(github.ref, 'refs/tags/v') || github.ref == 'refs/heads/astria' || github.event_name == 'pull_request' }}
+    steps:
+      # Checking out the repo
+      - uses: actions/checkout@v3
+      # https://github.com/docker/setup-qemu-action
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+      # https://github.com/docker/setup-buildx-action
+      - name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v2
+      - name: Log in to registry
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+      - name: Docker metadata
+        id: metadata
+        uses: docker/metadata-action@v4
+        with:
+          images: ghcr.io/astriaorg/cometbft
+          tags: |
+            type=ref,event=pr
+            type=semver,pattern={{major}}.{{minor}}.{{patch}}
+            type=sha
+            # set latest tag for `main` branch
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/astria' }}
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          # this gets rid of the unknown/unknown image that is created without this setting
+          # https://github.com/docker/build-push-action/issues/820#issuecomment-1455687416
+          provenance: false
+          context: .
+          file: ./DOCKER/Dockerfile
+          platforms: 'linux/amd64,linux/arm64'
+          push: true
+          tags: ${{ steps.metadata.outputs.tags }}
+          labels: ${{ steps.metadata.outputs.labels }}