chore(ci): pre-build and publish of DevContainer

* Added build and push to GHCR capabilities
* Provde a default `github.actor` for the `build` job in the `main.yml` workflow file.
* Add `.dockerignore` file to exclude unnecessary files from the Docker build context.
* Update syntax for act excludes in .dockerignore and .gitignore files.
* Added a context to the build in the .devcontainer.json file.

Closes: #4

.devcontainer/devcontainer.json

@@ -1,7 +1,8 @@
 {
     "name": "Catosplace Engineering Base Dev Container",
     "build": {
-        "dockerfile": "Dockerfile"
+        "dockerfile": "Dockerfile",
+        "context": ".devcontainer"
     },
     "features": {
         "ghcr.io/devcontainers/features/node:1": {

.dockerignore

@@ -0,0 +1,3 @@
+# act
+*.env
+*.secrets

.github/workflows/main.yml

@@ -26,7 +26,14 @@ jobs:
               uses: docker/login-action@v2
               with:
                 registry: ghcr.io
-                username: ${{ github.actor }}
+                username: ${{ github.actor || 'psellars' }}
                 password: ${{ secrets.GITHUB_TOKEN }}
-
+
+            # Per-build the container image
+            - name: Pre-build the container image
+              uses: devcontainers/ci@v0.3
+              with:
+                imageName: ghcr.io/catosplace-devcontainers/engineering-base
+                cacheFrom: ghcr.io/catosplace-devcontainers/engineering-base
+                push: always
 

.gitignore

@@ -1,6 +1,6 @@
-# act environment file
-.env
-.secrets
+# act
+*.env
+*.secrets
 
 # Dependency directories
 node_modules/