update final version of working Dockerfile

Dockerfile

@@ -1,18 +1,20 @@
-# FROM gradle:4.7.0-jdk8-alpine
-# LABEL maintainer="Ravish Nagaraj"
-# WORKDIR /src
-# COPY build/libs .
-# RUN gradle build
-
+#Use Alpine JDK 8 docker image to run the application
 FROM openjdk:8-jdk-alpine
 
-WORKDIR /src
-COPY /src ./src/
+#Use root as working directory
+WORKDIR /
+
+#Copy /src for running build and initial data set-up queries for the API
+COPY /src ./src
 
-EXPOSE 8080
+#Use this port to run the application
+EXPOSE 8085
 
+#Create a new directory to copy built JAR file
 RUN mkdir /api
 
+#Copy the built JAR file of the application into api folder
 COPY /build/libs/openflightsapi-1.0.0.jar /api/openfligthsapi.jar
 
+#Entrypoint command to run when Docker container is started
 ENTRYPOINT ["java", "-XX:+UnlockExperimentalVMOptions", "-XX:+UseCGroupMemoryLimitForHeap", "-Djava.security.egd=file:/dev/./urandom","-jar","/api/openfligthsapi.jar"]