Build docker images that include the test app and push to GHCR (#15)

.github/workflows/testapp-docker.yml

@@ -2,6 +2,8 @@ name: Docker E2E Node
 # Build & Push rebuilds the e2e Testapp docker image on every push to main and creation of tags
 # and pushes the image to https://hub.docker.com/r/tendermint/e2e-node
 on:
+  # Allow manual image builds
+  workflow_dispatch:
   push:
     branches:
       - main
@@ -11,6 +13,9 @@ on:
       - "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
 
+env:
+  REGISTRY: ghcr.io
+
 jobs:
   build:
     runs-on: ubuntu-latest
@@ -19,7 +24,7 @@ jobs:
       - name: Prepare
         id: prep
         run: |
-          DOCKER_IMAGE=tendermint/e2e-node
+          DOCKER_IMAGE="${{ env.REGISTRY }}/informalsystems/tendermint-e2e-node"
           VERSION=noop
           if [[ $GITHUB_REF == refs/tags/* ]]; then
             VERSION=${GITHUB_REF#refs/tags/}
@@ -40,17 +45,18 @@ jobs:
         with:
           platforms: all
 
-      - name: Set up Docker Build
-        uses: docker/setup-buildx-action@v2.2.1
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
 
-      - name: Login to DockerHub
+      - name: Login to GHCR
         if: ${{ github.event_name != 'pull_request' }}
-        uses: docker/login-action@v2.1.0
+        uses: docker/login-action@v2
         with:
-          username: ${{ secrets.DOCKERHUB_USERNAME }}
-          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
 
-      - name: Publish to Docker Hub
+      - name: Publish image
         uses: docker/[email protected]
         with:
           context: .