Combine docker build and push for releases

.github/workflows/on-main.yaml

@@ -1,25 +0,0 @@
-name: Docker Compose Build
-
-on:
-  push:
-    branches:
-      - main
-
-jobs:
-  build:
-    name: Run docker build
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: Get the version
-        id: vars
-        run: echo ::set-output name=sha::$(echo ${GITHUB_SHA:0:7})
-      - name: Run docker build
-        run: make docker-build
-      - name: Tag docker image
-        run: docker tag vulcanize/ipld-eth-db docker.pkg.github.com/vulcanize/ipld-eth-db/ipld-eth-db:${{steps.vars.outputs.sha}}
-      - name: Docker Login
-        run: echo ${{ secrets.GITHUB_TOKEN }} | docker login https://docker.pkg.github.com -u vulcanize --password-stdin
-      - name: Docker Push
-        run: docker push docker.pkg.github.com/vulcanize/ipld-eth-db/ipld-eth-db:${{steps.vars.outputs.sha}}
-

.github/workflows/publish.yaml

@@ -3,6 +3,22 @@ on:
   release:
     types: [published]
 jobs:
+  build:
+    name: Run docker build
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Get the version
+        id: vars
+        run: echo ::set-output name=sha::$(echo ${GITHUB_SHA:0:7})
+      - name: Run docker build
+        run: make docker-build
+      - name: Tag docker image
+        run: docker tag vulcanize/ipld-eth-db docker.pkg.github.com/vulcanize/ipld-eth-db/ipld-eth-db:${{steps.vars.outputs.sha}}
+      - name: Docker Login
+        run: echo ${{ secrets.GITHUB_TOKEN }} | docker login https://docker.pkg.github.com -u vulcanize --password-stdin
+      - name: Docker Push
+        run: docker push docker.pkg.github.com/vulcanize/ipld-eth-db/ipld-eth-db:${{steps.vars.outputs.sha}}
   push_to_registries:
     name: Push Docker image to Docker Hub
     runs-on: ubuntu-latest