Feat: Creating basic files to get the example of API

Files added:
- controllers where the endpoints are defined
- services where the business logic is defined
- database.dbml where the database schema is defined
- pom.xml updated with required dependencies

.gitignore

@@ -31,3 +31,29 @@ build/
 
 ### VS Code ###
 .vscode/
+
+### Java ###
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+replay_pid*