feat(actions): add GH self-hosted runner for tests requiring network syncs

.github/workflows/build-docker-image.yml

@@ -1,6 +1,24 @@
 name: Build docker image
 
 on:
+  workflow_dispatch:
+    inputs:
+      image_name:
+        description: 'The docker image name to use for the registry'
+        required: true
+        type: string
+      dockerfile_path:
+        description: 'The path to the Dockerfile in the repository'
+        required: true
+        type: string
+      dockerfile_target:
+        description: 'The target stage to build in the Dockerfile'
+        required: true
+        type: string
+      docker_context:
+        description: 'The context to use for the docker build'
+        required: false
+        type: string
   workflow_call:
     inputs:
       image_name:
@@ -12,6 +30,10 @@ on:
       dockerfile_target:
         required: true
         type: string
+      docker_context:
+        description: 'The context to use for the docker build'
+        required: false
+        type: string
       short_sha:
         required: false
         type: string
@@ -137,7 +159,7 @@ jobs:
         uses: docker/[email protected]
         with:
           target: ${{ inputs.dockerfile_target }}
-          context: .
+          context: ${{ inputs.docker_context || '.' }}
           file: ${{ inputs.dockerfile_path }}
           tags: ${{ steps.meta.outputs.tags }}
           labels: ${{ steps.meta.outputs.labels }}

.github/workflows/build-runner-image.yml

@@ -0,0 +1,22 @@
+name: Build runner image
+
+# Ensures that only one workflow task will run at a time. Previous builds, if
+# already in process, will get cancelled. Only the latest commit will be allowed
+# to run, cancelling any workflows in between
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+
+# TODO: add condition to only run when needed
+on:
+  push:
+
+jobs:
+  build:
+    name: Build CI Docker
+    uses: ./.github/workflows/build-docker-image.yml
+    with:
+      dockerfile_path: ./docker/gh-runner/Dockerfile
+      dockerfile_target: runner
+      docker_context: ./docker/gh-runner
+      image_name: gh-runner