Create SASL_SCRAM.md (#769)

guides/SASL_SCRAM.md

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+# How to configure SASL SCRAM Authentication
+
+You could pass sasl configs in properties section for each cluster.
+ 
+## Examples: 
+
+Please replace 
+- <KAFKA_NAME> with cluster name
+- <KAFKA_URL> with broker list
+- <KAFKA_USERNAME> with username
+- <KAFKA_PASSWORD> with password
+
+### Running From Docker Image
+
+```sh
+docker run -p 8080:8080 \
+    -e KAFKA_CLUSTERS_0_NAME=<KAFKA_NAME> \
+    -e KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS=<KAFKA_URL> \
+    -e KAFKA_CLUSTERS_0_PROPERTIES_SECURITY_PROTOCOL=SASL_SSL \
+    -e KAFKA_CLUSTERS_0_PROPERTIES_SASL_MECHANISM=SCRAM-SHA-512 \     
+    -e KAFKA_CLUSTERS_0_PROPERTIES_SASL_JAAS_CONFIG=org.apache.kafka.common.security.scram.ScramLoginModule required username="<KAFKA_USERNAME>" password="<KAFKA_PASSWORD>"; \
+    -d provectuslabs/kafka-ui:latest 
+```
+
+### Running From Docker-compose file
+
+```yaml
+
+version: '3.4'
+services:
+  
+  kafka-ui:
+    image: provectuslabs/kafka-ui
+    container_name: kafka-ui
+    ports:
+      - "888:8080"
+    restart: always
+    environment:
+      - KAFKA_CLUSTERS_0_NAME=<KAFKA_NAME>
+      - KAFKA_CLUSTERS_0_BOOTSTRAPSERVERS=<KAFKA_URL>
+      - KAFKA_CLUSTERS_0_PROPERTIES_SECURITY_PROTOCOL=SASL_SSL
+      - KAFKA_CLUSTERS_0_PROPERTIES_SASL_MECHANISM=SCRAM-SHA-512
+      - KAFKA_CLUSTERS_0_PROPERTIES_SASL_JAAS_CONFIG=org.apache.kafka.common.security.scram.ScramLoginModule required username="<KAFKA_USERNAME>" password="<KAFKA_PASSWORD>";
+      - KAFKA_CLUSTERS_0_PROPERTIES_PROTOCOL=SASL
+```
+
+### Configuring by application.yaml
+
+```yaml
+kafka:
+  clusters:
+    - name: local
+      bootstrapServers: <KAFKA_URL>
+      properties:
+        security.protocol: SASL_SSL
+        sasl.mechanism: SCRAM-SHA-512        
+        sasl.jaas.config: org.apache.kafka.common.security.scram.ScramLoginModule required username="<KAFKA_USERNAME>" password="<KAFKA_PASSWORD>";
+```