.github/workflows/build-image.yml: Add step for HTTPS test

Separate the HTTPS access test as a new step for this workflow.

Author: zakame

.github/workflows/build-image.yml

@@ -53,6 +53,10 @@ jobs:
           dir='${{ matrix.directory }}'
           img="perl:${dir//,/-}"
           ./official-images/test/run.sh "$img"
+      - name: Run HTTPS access test
+        run: |
+          dir='${{ matrix.directory }}'
+          img="perl:${dir//,/-}"
           docker run "$img" perl -MHTTP::Tiny -E 'if (HTTP::Tiny->new->get("https://github.com")->{status} == 200) { exit 0 } exit 1'
       - name: Run cpanm install test
         run: |