updated readme, removed username from properies

Author: murog

.gitignore

@@ -22,4 +22,8 @@
 /nbbuild/
 /dist/
 /nbdist/
-/.nb-gradle/
+/.nb-gradle/
+
+
+.DS_Store
+

Readme.md

@@ -1,3 +1,79 @@
+
+
+## what is your application?
+Java application can be compiled down to one executable file (ex: .jar, .war). In our case, we will be creating a jar file that will be saved to a directory called __target__.
+This can be done from your IDE (ex: Intellij, Eclipse).
+```bash
+$ mvn clean install
+$ ls target 
+< there should be a bunch of files>
+classes
+generated-sources
+generated-test-sources
+maven-archiver
+maven-status
+postgres-demo-0.0.1-SNAPSHOT.jar
+postgres-demo-0.0.1-SNAPSHOT.jar.original
+surefire-reports
+test-classes
+```
+to run you application from the command line
+```bash
+$ java -jar target/postgres-demo-0.0.1-SNAPSHOT.jar
+```
+## what does your application need to run?
+
+- java 8
+    - maven
+- database (ex: postgres)
+    - database table 
+    - databese username
+    
+You can check this information in the application.
+
+To find the java version, check the pom.xml
+```bash
+$ cat pom.xml
+< lots of stuff will be in here>
+...    
+    <name>postgres-demo</name>
+    <description>Demo project for Spring Boot</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>2.0.1.RELEASE</version>
+        <relativePath/> <!-- lookup parent from repository -->
+    </parent>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
+        <java.version>1.8</java.version>
+    </properties>
+...
+```
+
+```bash
+$ cat src/main/resources/application.properties
+## Spring DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties)
+spring.datasource.url=jdbc:postgresql://localhost:5432/postgres_demo
+spring.datasource.username=
+spring.datasource.password=
+
+# The SQL dialect makes Hibernate generate better SQL for the chosen database
+spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
+
+# Hibernate ddl auto (create, create-drop, validate, update)
+spring.jpa.hibernate.ddl-auto = update
+```
+
+In this example, our application uses a postgres database called _postgres_demo_.  There is no username or password defined. 
+
+
+
+
+---------
 ## Spring Boot, PostgreSQL, JPA, Hibernate REST API Demo
 
 ## Tutorial
@@ -31,4 +107,4 @@ Alternatively, you can package the application in the form of a JAR file and the
 ```bash
 mvn clean package
 java -jar target/postgres-demo-0.0.1-SNAPSHOT.jar
-```
+```

src/main/resources/application.properties

@@ -1,6 +1,6 @@
 ## Spring DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties)
 spring.datasource.url=jdbc:postgresql://localhost:5432/postgres_demo
-spring.datasource.username= rajeevkumarsingh
+spring.datasource.username=
 spring.datasource.password=
 
 # The SQL dialect makes Hibernate generate better SQL for the chosen database