Dockerfile: set HOME to /

Signed-off-by: Marko Mudrinić <mudrinic.mare@gmail.com>

Dockerfile

@@ -53,6 +53,10 @@ FROM base AS test-variant
 # Include auditor testing fixtures.
 COPY --from=builder /go/src/app/test-e2e/cip-auditor/fixture /e2e-fixtures
 
+# The docker/auth configuration file is located in the root (/), therefore we
+# set HOME to /, so tools can find the config file.
+ENV HOME=/
+
 # Trigger the auditor on startup.
 ENTRYPOINT ["/kpromo", "cip", "audit", "--verbose"]
 
@@ -62,5 +66,9 @@ FROM base AS prod-variant
 LABEL maintainers="Kubernetes Authors"
 LABEL description="kpromo: The Kubernetes project artifact promoter"
 
+# The docker/auth configuration file is located in root (/), therefore we
+# set HOME to /, so tools can find the config file.
+ENV HOME=/
+
 # Allow the runtime argument to choose the final variant.
 FROM ${variant}-variant AS final