Set version to v1.0

Author: jaydrogers

src/Dockerfile

@@ -5,7 +5,8 @@
 ARG UPSTREAM_CHANNEL=''
 ARG BASE_OS_FLAVOR='ubuntu'
 ARG BASE_OS_VERSION='20.04'
-ARG BASE_IMAGE="serversideup/s6-overlay:${UPSTREAM_CHANNEL}${BASE_OS_FLAVOR}-${BASE_OS_VERSION}"
+ARG S6_OVERLAY_VERSION='v1.0.0'
+ARG BASE_IMAGE="serversideup/s6-overlay:${S6_OVERLAY_VERSION}"
 
 FROM ${BASE_IMAGE}
 LABEL maintainer="Jay Rogers (@jaydrogers)"