Docker (#51)

* testing docker build

* fixed spacing issue

* updated username

* updated name for testing

* finished image pusher

.github/workflows/create-and-push-image.yml

@@ -0,0 +1,26 @@
+name: Create and Push Image
+
+on:
+  push:
+    tags:
+      - '*'
+
+jobs:
+  CreateAndPush:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1 
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASS }}
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          tags: avaplatform/avalanche-rosetta:latest