🚀 Prepare dev container workflows for production

- Remove branch-specific testing configuration
- Publish workflow now only runs on main branch
- Integration workflow uses :latest cache from GHCR
- Clean up testing artifacts from Dockerfile

Author: retlehs

.devcontainer/Dockerfile

@@ -58,5 +58,3 @@ RUN curl -O https://raw.githubusercontent.com/wp-cli/builds/gh-pages/phar/wp-cli
 ENV APPLICATION_PATH=/roots/app
 
 USER vscode
-
-# Trigger dev container workflow

.github/workflows/devcontainer.yml

@@ -2,7 +2,7 @@ name: Publish Dev Container
 
 on:
   push:
-    branches: [main, devcontainer-updates]
+    branches: [main]
     paths:
       - '.devcontainer/**'
   workflow_dispatch:
@@ -28,6 +28,5 @@ jobs:
         uses: devcontainers/[email protected]
         with:
           imageName: ghcr.io/roots/acorn-devcontainer
-          imageTag: ${{ github.ref_name }}
           cacheFrom: ghcr.io/roots/acorn-devcontainer
           push: always

.github/workflows/integration.yml

@@ -16,7 +16,7 @@ jobs:
         uses: devcontainers/[email protected]
         with:
           configFile: .devcontainer/devcontainer.json
-          cacheFrom: ghcr.io/roots/acorn-devcontainer:${{ github.ref_name }}
+          cacheFrom: ghcr.io/roots/acorn-devcontainer
           push: never
           runCmd: |
             # Wait for database to be ready