Merge pull request #5 from stackhpc/rocky9

Bump image to use Rocky9 and Squid 5.5

.github/workflows/build-and-push-images.yaml

@@ -0,0 +1,55 @@
+name: Create and publish a Docker image
+
+on:
+  push:
+    branches:
+      - 'master'
+    tags:
+      - '*'
+  pull_request:
+    branches:
+      - 'master'
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v3
+
+      - name: Log in to the Container registry
+        uses: docker/login-action@v3
+        if: github.event_name != 'pull_request'
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+          flavor: |
+            latest=false
+          tags: |
+            # minimal
+            type=ref,event=tag
+            # set latest tag for default branch
+            type=raw,value=latest,enable={{is_default_branch}}
+        
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}

Dockerfile

@@ -1,7 +1,7 @@
-FROM rockylinux:8.6
+FROM rockylinux:9
 LABEL maintainer=StackHPC
 
-ENV SQUID_VERSION=4.15 \
+ENV SQUID_VERSION=5.5 \
     SQUID_CACHE_DIR=/var/spool/squid \
     SQUID_LOG_DIR=/var/log/squid \
     SQUID_USER=squid