Added 'git submodule update --init' after cloning Varnish repo

Author: carlosabalde

.github/workflows/main.yml

@@ -38,6 +38,7 @@ jobs:
         run: |
           git clone https://github.com/varnishcache/varnish-cache.git ./varnish
           pushd varnish
+          git submodule update --init
           ./autogen.sh
           CC='${{ matrix.cc }}' ./configure
           make -sj32

Dockerfile

@@ -43,6 +43,7 @@ RUN apt update \
 
 RUN git clone https://github.com/varnishcache/varnish-cache.git /tmp/varnish \
     && cd /tmp/varnish \
+    && git submodule update --init \
     && ./autogen.sh \
     && ./configure \
     && make \