Add .gitignore file

.gitignore

@@ -0,0 +1,53 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Application Specific ###
+application-dev.yml
+application-prod.yml
+*.log
+logs/
+*.properties
+
+### System Files ###
+.DS_Store
+Thumbs.db
+
+### Maven ###
+.mvn/
+mvnw
+mvnw.cmd
+
+### Configuration Files ###
+src/main/resources/application-*.yml
+!src/main/resources/application.yml