fix: set environment in validate workflow

.github/workflows/validate.yml

@@ -16,21 +16,10 @@ on:
       - develop
 
 jobs:
-  validate:
-    name: Validate
-    runs-on: ${{ matrix.os }}
-    timeout-minutes: 60
-
-    strategy:
-      fail-fast: true
-      matrix:
-        node-version: [22.x]
-        os: [ubuntu-latest]
-
+  env:
+    name: Generate environment variables
+    runs-on: ubuntu-latest
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-
       - name: Derive environment from git ref
         id: environment
         run: |
@@ -40,12 +29,37 @@ jobs:
           elif [ "${{ github.ref }}" = "refs/heads/develop" ]; then
             ENVIRONMENT="development"
             APP_NAME_SUFFIX="-development"
+          elif [ "${{github.event_name}}" = "pull_request"]; then
+            ENVIRONMENT="pr/${{ github.event.pull_request.number }}"
+            APP_NAME_SUFFIX="-pr-${{ github.event.pull_request.number }}"
           else
             exit 1
           fi
 
           echo "ENVIRONMENT=$ENVIRONMENT" >> $GITHUB_OUTPUT
           echo "APP_NAME_SUFFIX=$APP_NAME_SUFFIX" >> $GITHUB_OUTPUT
+    outputs:
+      environment: "${{ steps.environment.outputs.ENVIRONMENT }}"
+      app_name: "thomas-bernhard-global${{ steps.environment.outputs.APP_NAME_SUFFIX }}"
+      registry: "ghcr.io"
+      image: "${{ github.repository }}"
+
+  validate:
+    name: Validate
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 60
+    environment:
+      name: "${{ needs.env.outputs.environment }}"
+
+    strategy:
+      fail-fast: true
+      matrix:
+        node-version: [22.x]
+        os: [ubuntu-latest]
+
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
 
       # Necessary because `actions/setup-node` does not yet support `corepack`.
       # @see https://github.com/actions/setup-node/issues/531