Add Dockerfile for initial ramdisk environment

Author: sjmiller609

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

@@ -0,0 +1,38 @@
+name: Build Initrd Base Image
+
+on:
+  push:
+    paths:
+      - 'lib/system/alpine-initrd/Dockerfile'
+      - '.github/workflows/build-initrd-image.yml'
+  workflow_dispatch:
+
+jobs:
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      
+      - name: Get short SHA
+        id: sha
+        run: echo "short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+      
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+      
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_PASSWORD }}
+      
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: ./lib/system/alpine-initrd
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: ${{ secrets.DOCKERHUB_USERNAME }}/hypeman-initrd:${{ steps.sha.outputs.short }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+

lib/system/alpine-initrd/Dockerfile

@@ -0,0 +1,11 @@
+# Alpine-based initrd base image for Hypeman
+# Includes socat for vsock-based remote exec functionality
+FROM alpine:3.22
+
+# Install socat for vsock support
+RUN apk add --no-cache socat
+
+# Minimal metadata
+LABEL org.opencontainers.image.description="Alpine base image with socat for Hypeman initrd"
+LABEL org.opencontainers.image.source="https://github.com/onkernel/hypeman"
+