Started spring boot fundamentals

ps-springboot-1/src/main/resources/application.properties

-spring.datasource.url=jdbc:postgresql://localhost:5432/conference_app
+spring.datasource.url=${DB_URL}
 spring.datasource.username=postgres
 spring.datasource.password=Welcome
 spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
@@ -6,3 +6,5 @@ spring.jpa.hibernate.ddl-auto=none
 spring.jpa.hibernate.show-sql=true
 
 spring.jpa.properties.hibernate.jdbc.lob.non_contextual_creation=true
+
+server.port=5000

ps-springboot-1/src/main/resources/application.yml

+spring:
+  datasource:
+    url: ${DB_URL}
+    username: postgres
+    password: Welcome
+  jpa:
+    database-platform: org.hibernate.dialect.PostgreSQLDialect
+    hibernate:
+      ddl-auto: none
+      show-sql: true
+    properties:
+      hibernate:
+        jdbc:
+          lob:
+            non_contextual_creation: true
+server:
+  port: 5000
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