Update application.properties

src/main/resources/application.properties

@@ -9,7 +9,7 @@ logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE
 server.error.include-message=always
 spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
 spring.datasource.hikari.minimum-idle=1
-spring.datasource.hikari.maximum-pool-size=${DATABASE_MAX_CONNECTIONS:0}
+spring.datasource.hikari.maximum-pool-size=${DATABASE_MAX_CONNECTIONS:1}
 logging.level.root=INFO
 logging.level.org.springframework.security=WARN
 logging.level.org.hibernate.SQL=WARN

target/classes/application.properties

@@ -1,14 +1,15 @@
-spring.datasource.url=jdbc:postgresql://localhost:5432/postgresglobalapp
-spring.datasource.username=postgres
-spring.datasource.password= Qwerty123456!
+spring.datasource.url=${DATABASE_URL:jdbc:postgresql://localhost:5432/postgresglobalapp}
+spring.datasource.username=${DATABASE_USERNAME:postgres}
+spring.datasource.password=${DATABASE_PASSWORD:Qwerty123456!}
 spring.datasource.driver-class-name=org.postgresql.Driver
 spring.jpa.show-sql=true
 spring.sql.init.mode=always
 spring.jpa.hibernate.ddl-auto=update
 logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE
 server.error.include-message=always
 spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
-spring.datasource.max-active=3
+spring.datasource.hikari.minimum-idle=1
+spring.datasource.hikari.maximum-pool-size=${DATABASE_MAX_CONNECTIONS:1}
 logging.level.root=INFO
 logging.level.org.springframework.security=WARN
 logging.level.org.hibernate.SQL=WARN