add input: azureblob

add input: azureblob

diff --git a/Dockerfile b/Dockerfile
index e5d44bc..9bbf096 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,2 +1,2 @@
 FROM docker.elastic.co/logstash/logstash:6.0.1
-RUN logstash-plugin install logstash-input-elasticache logstash-input-lumberjack logstash-input-s3 logstash-input-rds logstash-filter-prune logstash-output-statsd
+RUN logstash-plugin install logstash-input-azureblob logstash-input-elasticache logstash-input-lumberjack logstash-input-s3 logstash-input-rds logstash-filter-prune logstash-output-statsd

GitHub sha: 539fa978e96595bf574e3d12a1250e2b98b47304