.github/workflows/test.yaml: Test dzil image as well

This probably needs its own workflow later, but for now just do a quick
build and check using the dzil image.

Author: zakame

Diff for: .github/workflows/test.yaml

@@ -1,4 +1,4 @@
-name: Build image
+name: Build images
 
 on:
   push:
@@ -13,12 +13,15 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@master
-      - name: Build base perl image
+      - name: Build images
         run: |
           docker version
           [ -n $DEBIAN_PROXY ] && docker_build_opts="--build-arg=DEBIAN_PROXY=${DEBIAN_PROXY}"
           docker build "$docker_build_opts" -t deriv/perl .
+          cd dzil && docker build "$docker_build_opts" -t deriv/dzil .
       - name: Inspect image creation and tag time
         run: |
           docker image inspect --format \'{{.Created}}\' deriv/perl
           docker image inspect --format \'{{.Metadata.LastTagTime}}\' deriv/perl
+          docker image inspect --format \'{{.Created}}\' deriv/dzil
+          docker image inspect --format \'{{.Metadata.LastTagTime}}\' deriv/dzil