Feature/postgres automation and credentials separation

dev.env

@@ -0,0 +1,3 @@
+DB_URL=
+DB_USER=
+DB_PASSWORD=

docker-compose.yml

@@ -0,0 +1,14 @@
+version: '3.5'
+
+services:
+  postgres-automaton:
+    container_name: postgres_demo_application
+    image: postgres:latest
+    ports:
+      - "5432:5432"
+    environment:
+      POSTGRES_USER: ${DB_USER}
+      POSTGRES_PASSWORD: ${DB_PASSWORD}
+      PGDATA: /data/postgres
+    volumes:
+      - ./postgres-db:/data/postgres

src/main/resources/application.properties

@@ -1,10 +1,10 @@
 ## Spring DATASOURCE (DataSourceAutoConfiguration & DataSourceProperties)
-spring.datasource.url=jdbc:postgresql://localhost:5432/postgres_demo
-spring.datasource.username= postgres
-spring.datasource.password=
+spring.datasource.url=jdbc:postgresql://${DB_URL}:5432/${DB_USER}
+spring.datasource.username=${DB_USER}
+spring.datasource.password=${DB_PASSWORD}
 
 # The SQL dialect makes Hibernate generate better SQL for the chosen database
-spring.jpa.properties.hibernate.dialect = org.hibernate.dialect.PostgreSQLDialect
+spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.PostgreSQLDialect
 
 # Hibernate ddl auto (create, create-drop, validate, update)
-spring.jpa.hibernate.ddl-auto = update
+spring.jpa.hibernate.ddl-auto=update