Revert Dockerfile.debian10 changes

Signed-off-by: Amin Vakil <[email protected]>

Author: aminvakil

packaging/testing/smoke/packages/Dockerfile.debian10

@@ -1,11 +1,11 @@
 # For staging upgrade we use the 'official-install' as the base
-ARG STAGING_BASE=docker.io/dokken/debian-11
+ARG STAGING_BASE=docker.io/dokken/debian-10
 
 ARG RELEASE_URL=https://packages.fluentbit.io
 ARG RELEASE_KEY=https://packages.fluentbit.io/fluentbit.key
 
 # hadolint ignore=DL3006
-FROM docker.io/dokken/debian-11 as official-install
+FROM docker.io/dokken/debian-10 as official-install
 
 ARG RELEASE_URL
 ENV FLUENT_BIT_PACKAGES_URL=${RELEASE_URL}
@@ -37,7 +37,7 @@ ENV FLUENT_BIT_PACKAGES_KEY=${STAGING_KEY}
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 RUN wget -qO - $FLUENT_BIT_PACKAGES_KEY | apt-key add -
-RUN echo "deb $FLUENT_BIT_PACKAGES_URL/debian/bullseye bullseye main" >> /etc/apt/sources.list
+RUN echo "deb $FLUENT_BIT_PACKAGES_URL/debian/buster buster main" >> /etc/apt/sources.list
 # hadolint ignore=DL3015,DL3008,DL3009
 RUN apt-get update && apt-get install -y fluent-bit
 RUN systemctl enable fluent-bit