ci: add test

Signed-off-by: Ramkumar Chinchani <rchincha@cisco.com>

.github/workflows/build.yaml

@@ -168,16 +168,20 @@ jobs:
             GO111MODULE=off go get github.com/opencontainers/umoci/cmd/umoci
             curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin
             apt-get install -yy autoconf automake make autogen autoconf libtool binutils git squashfs-tools libcryptsetup-dev libdevmapper-dev cryptsetup-bin squashfuse
+            echo WHOAMI=$(whoami)
+
             # add a non-root user "stacker"
             adduser --disabled-login --no-create-home --gecos "stacker" stacker
 
-            echo WHOAMI=$(whoami)
+            mkdir /src-copy
+            cp -R /src/* /src-copy/
+            chown -R stacker:stacker /src-copy
 
             # execute this as "stacker" user
             sudo -i -u stacker bash << EOF
             echo WHOAMI=$(whoami)
             export PATH=$PATH:/usr/local/go/bin
-            cd /src
+            cd /src-copy
             make go-download
             make show-info
             make stacker-dynamic VERSION_FULL=${{ inputs.build-id }}