Remove pebble certs, they removed the dockerhub image that had armv7 support.

The ghcr image doesn't have it, so it was causing builds to fail.

Author: jc21

docker/Dockerfile

@@ -4,7 +4,6 @@
 # This file assumes that the frontend has been built using ./scripts/frontend-build
 
 FROM nginxproxymanager/testca AS testca
-FROM letsencrypt/pebble AS pebbleca
 FROM nginxproxymanager/nginx-full:certbot-node
 
 ARG TARGETPLATFORM
@@ -46,7 +45,6 @@ RUN yarn install \
 
 # add late to limit cache-busting by modifications
 COPY docker/rootfs /
-COPY --from=pebbleca /test/certs/pebble.minica.pem /etc/ssl/certs/pebble.minica.pem
 COPY --from=testca /home/step/certs/root_ca.crt /etc/ssl/certs/NginxProxyManager.crt
 
 # Remove frontend service not required for prod, dev nginx config as well

docker/dev/Dockerfile

@@ -1,5 +1,4 @@
 FROM nginxproxymanager/testca AS testca
-FROM letsencrypt/pebble AS pebbleca
 FROM nginxproxymanager/nginx-full:certbot-node
 LABEL maintainer="Jamie Curnow <jc@jc21.com>"
 
@@ -33,7 +32,6 @@ RUN rm -f /etc/nginx/conf.d/production.conf \
 	&& chmod 644 -R /root/.cache
 
 # Certs for testing purposes
-COPY --from=pebbleca /test/certs/pebble.minica.pem /etc/ssl/certs/pebble.minica.pem
 COPY --from=testca /home/step/certs/root_ca.crt /etc/ssl/certs/NginxProxyManager.crt
 
 EXPOSE 80 81 443