update dockerfile

flink/build.sh

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash 
+
+docker pull flink:scala_2.12-java8
+
+docker stop jobmanager
+docker rm jobmanager
+docker stop taskmanager 
+docker rm taskmanager
+
+FLINK_PROPERTIES="jobmanager.rpc.address: jobmanager"
+
+docker run -dit --name="jobmanager" \
+  --network flink-network -p 8081:8081  \
+  --env FLINK_PROPERTIES="${FLINK_PROPERTIES}" \
+  flink:scala_2.12-java8 jobmanager
+
+docker run -dit --name="taskmanager" \
+  --network flink-network  \
+  --env FLINK_PROPERTIES="${FLINK_PROPERTIES}" \
+  flink:scala_2.12-java8 taskmanager