set buildkit progress to plain to reduce CI noise (#175)

Author: jsvd

.ci/docker-run.sh

@@ -5,6 +5,8 @@ set -ex
 
 cd .ci
 
+export BUILDKIT_PROGRESS=plain
+
 if [ "$INTEGRATION" == "true" ]; then
     docker-compose up --exit-code-from logstash
 else

.ci/docker-setup.sh

@@ -46,6 +46,8 @@ if [ "$ELASTIC_STACK_VERSION" ]; then
 
     cd .ci
 
+    export BUILDKIT_PROGRESS=plain
+
     if [ "$INTEGRATION" == "true" ]; then
         docker-compose down
         docker-compose build