Fixing falco:stable image

- Updating stable image to pull from `debian:stable`
 - Updating maintainer label in all Dockerfiles to include `LABEL maintainer="cncf-falco-dev@lists.cncf.io"`

Signed-off-by: Kris Nova <kris@nivenly.com>

docker/local/Dockerfile

@@ -1,7 +1,7 @@
 FROM debian:unstable
 
 LABEL usage="docker run -i -t -v /var/run/docker.sock:/host/var/run/docker.sock -v /dev:/host/dev -v /proc:/host/proc:ro -v /boot:/host/boot:ro -v /lib/modules:/host/lib/modules:ro -v /usr:/host/usr:ro --name NAME IMAGE"
-LABEL maintainer="opensource@sysdig.com"
+LABEL maintainer="cncf-falco-dev@lists.cncf.io"
 
 ARG FALCO_VERSION=
 RUN test -n FALCO_VERSION

docker/minimal/Dockerfile

@@ -1,6 +1,6 @@
 FROM ubuntu:18.04 as ubuntu
 
-LABEL maintainer="opensource@sysdig.com"
+LABEL maintainer="cncf-falco-dev@lists.cncf.io"
 
 ARG FALCO_VERSION=0.20.0
 

docker/rhel/Dockerfile

@@ -1,6 +1,6 @@
 FROM registry.access.redhat.com/rhel7
 
-LABEL maintainer="opensource@sysdig.com"
+LABEL maintainer="cncf-falco-dev@lists.cncf.io"
 
 ### Atomic/OpenShift Labels - https://github.com/projectatomic/ContainerApplicationGenericLabels
 LABEL name="falco" \

docker/slim-dev/Dockerfile

@@ -1,6 +1,6 @@
 FROM ubuntu:18.04
 
-LABEL maintainer="opensource@sysdig.com"
+LABEL maintainer="cncf-falco-dev@lists.cncf.io"
 
 ENV FALCO_REPOSITORY dev
 

docker/slim-stable/Dockerfile

@@ -1,6 +1,6 @@
 FROM ubuntu:18.04
 
-LABEL maintainer="opensource@sysdig.com"
+LABEL maintainer="cncf-falco-dev@lists.cncf.io"
 
 ENV FALCO_REPOSITORY stable
 

docker/stable/Dockerfile

@@ -1,6 +1,6 @@
-FROM debian:unstable
+FROM debian:stable
 
-LABEL maintainer="opensource@sysdig.com"
+LABEL maintainer="cncf-falco-dev@lists.cncf.io"
 
 ENV FALCO_REPOSITORY stable