Add README.md

README.md

+# Product Info API
+
+1. product-info-api will read products csv file via spark structured streaming (readStream) and write (writeStream) all records to kafka topic with specific batchId. This event will be trigged via POST method by uploading csv file.
+2. This API will consume the kafka topic via sspark structured streaming (readStream) and write (writeStream)  transformed records to another csv. This event will be triggered via GET call by passing batchId 
+
+Technologies Used :
+
+1. Spring boot
+2. Java8
+3. Spark Core
+4. Spark Sql
+5. Spark kafka Connector
+5. Spring Webflux
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