Rename Debian image to bookworm

.dockerignore

@@ -1,4 +1,4 @@
 test
 
 Dockerfile.alpine
-Dockerfile.debian
+Dockerfile.bookworm

.github/workflows/ci.yml

@@ -13,9 +13,9 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        operating_system:
+        flavor:
           - alpine
-          - debian
+          - bookworm
         pg_version:
           - "9.5"
           - "9.6"
@@ -43,15 +43,15 @@ jobs:
       - name: Build and push image
         uses: docker/build-push-action@v5
         with:
-          file: "Dockerfile.${{ matrix.operating_system }}"
+          file: "Dockerfile.${{ matrix.flavor }}"
           push: true
           platforms: linux/amd64,linux/arm64
           build-args: |
             "PGTARGET=16"
           target: "build-${{ matrix.pg_version }}"
-          tags: "pgautoupgrade/pgautoupgrade:build-${{ matrix.pg_version }}-${{ matrix.operating_system }}"
+          tags: "pgautoupgrade/pgautoupgrade:build-${{ matrix.pg_version }}-${{ matrix.flavor }}"
           cache-to: type=inline
-          cache-from: type=registry,ref=pgautoupgrade/pgautoupgrade:build-${{ matrix.pg_version }}-${{ matrix.operating_system }}
+          cache-from: type=registry,ref=pgautoupgrade/pgautoupgrade:build-${{ matrix.pg_version }}-${{ matrix.flavor }}
 
   target-images:
     runs-on: ubuntu-latest
@@ -79,8 +79,7 @@ jobs:
         operating_system:
           - flavor: "alpine"
             version: "3.19"
-          - flavor: "debian"
-            version: "bookworm"
+          - flavor: "bookworm"
         pg_target:
           - "12"
           - "13"