Change from centos7 Dockerfile to rocky8 (#2304)

Author: samtygier-stfc

.github/workflows/build_docker.yaml

@@ -60,11 +60,11 @@ jobs:
           tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:ubuntu18
           labels: ${{ steps.meta.outputs.labels }}
 
-      - name: Build and push Centos Docker image
+      - name: Build and push Rocky8 Docker image
         uses: docker/build-push-action@v4
         with:
           context: .
-          file: ./docker/centos7.Dockerfile
+          file: ./docker/rocky8.Dockerfile
           push: true
-          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:centos7
+          tags: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:rocky8
           labels: ${{ steps.meta.outputs.labels }}

docker/centos7.Dockerfile renamed to docker/rocky8.Dockerfile

@@ -3,7 +3,7 @@
 # This Dockerfile creates a developer image. It requires that the following things are mounted:
 # - Mantid Imaging source at /opt/mantidimaging.
 
-FROM centos:centos7
+FROM rockylinux:8
 
 WORKDIR /opt/
 
@@ -38,4 +38,4 @@ ENV LD_LIBRARY_PATH=/opt/miniconda/lib/
 
 VOLUME /opt/mantidimaging
 
-ENTRYPOINT ["/entrypoint.sh"]
+ENTRYPOINT ["/entrypoint.sh"]

docs/release_notes/next/dev-2296-migrate-to-rocky8-docker

@@ -0,0 +1 @@
+#2296: Migrated from the Centos7 Docker image to Rocky8 to match IDaas