Feat: add busybox based image build (#154)

Co-authored-by: mael le saout <[email protected]>

.github/workflows/ci.yaml

@@ -94,6 +94,20 @@ jobs:
             type=semver,pattern={{version}}
             type=semver,pattern={{major}}
 
+      - name: Docker meta busybox
+        id: meta-busybox
+        uses: docker/metadata-action@v4
+        with:
+          images: |
+            ghcr.io/${{ github.repository }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}
+          flavor: |
+            suffix=-busybox
+
       - name: Login to GHCR
         uses: docker/login-action@v2
         with:
@@ -110,3 +124,15 @@ jobs:
           labels: ${{ steps.meta.outputs.labels }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+
+      - name: Build and push busybox based image
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta-busybox.outputs.tags }}
+          labels: ${{ steps.meta-busybox.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          build-args: |
+            BASE_IMAGE=busybox:1.36-uclibc

Dockerfile

@@ -1,6 +1,7 @@
 # Copyright 2022 The OWASP Coraza contributors
 # SPDX-License-Identifier: Apache-2.0
 
-FROM scratch
+ARG BASE_IMAGE
+FROM ${BASE_IMAGE:-scratch}
 
 COPY build/main.wasm /plugin.wasm