fix gh action syntax (#4)

* containerize w/ github action to build and push to ghcr

* fix gh action yml syntax

* enable manual trigger

* fix syntax

.github/workflows/astria-build-and-publish-image.yml

@@ -1,10 +1,12 @@
-build-and-publish-latest:
+name: Build and Publish Docker image
 on:
+  workflow_dispatch:
   push:
     branches:
       - astria # Running this job only for astria branch
+jobs:
+  build-and-publish-latest:
     runs-on: ubuntu-latest
-
     steps:
       - uses: actions/checkout@v2 # Checking out the repo
       - uses: actions/setup-go@v4