ADD github action to build the simplesamlphp image

The SimpleSAMLphp SP is its own app and needs to have its own image
built. This is required for the SimpleSAMLphp extension.

I also updated the github action steps to their latest versions.

.github/workflows/main.yml

@@ -33,7 +33,7 @@ jobs:
 
       - name: Docker meta
         id: meta
-        uses: docker/metadata-action@v3
+        uses: docker/metadata-action@v5
         with:
          images: ubcctlt/mediawiki
          # generate Docker tags based on the following events/attributes
@@ -52,11 +52,56 @@ jobs:
 
       - name: Build and push
         id: docker_build
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           push: ${{ github.event_name != 'pull_request'  }}
           tags: ${{ steps.meta.outputs.tags  }}
           labels: ${{ steps.meta.outputs.labels  }}
 
       - name: Image digest
         run: echo ${{ steps.docker_build.outputs.digest }}
+  buildSimplesamlphp:
+    # builds and pushes the SimpleSAMLphp SP component to a separate docker hub
+    # repo
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_HUB_USERNAME }}
+          password: ${{ secrets.DOCKER_HUB_ACCESS_TOKEN }}
+
+      - name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+         images: ubcctlt/mediawiki-simplesamlphp
+         # generate Docker tags based on the following events/attributes
+         tags: |
+           type=schedule
+           type=ref,event=branch
+           type=ref,event=pr
+           type=ref,event=tag
+           type=semver,pattern={{version}}
+           type=semver,pattern={{major}}.{{minor}}
+           type=semver,pattern={{major}}
+           type=sha
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v6
+        with:
+          context: ./docker/simplesamlphp/sp/
+          file: Dockerfile.sp
+          push: ${{ github.event_name != 'pull_request'  }}
+          tags: ${{ steps.meta.outputs.tags  }}
+          labels: ${{ steps.meta.outputs.labels  }}
+
+      - name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}