Add: backend dir and moved frontend to frontend dir

backend/src/main/resources/application-dev.yaml

@@ -0,0 +1,16 @@
+server:
+  port: 8080
+  servlet:
+    context-path: /v1/
+
+spring:
+  datasource:
+    url: jdbc:mariadb://localhost:3306/miniaturium
+    username: admin
+    password: ${DB_PASS}
+    driver-class-name: org.mariadb.jdbc.Driver
+
+logging:
+  level:
+    org.hibernate.SQL: DEBUG
+    org.hibernate.orm.jdbc.bind: TRACE

backend/src/main/resources/application-prod.yaml

@@ -0,0 +1,15 @@
+server:
+  port: 8080
+  servlet:
+    context-path: /v1/
+
+spring:
+  datasource:
+    url: jdbc:mariadb://mariadb:3306/miniaturium
+    username: ${DB_USER}
+    password: ${DB_PASS}
+    driver-class-name: org.mariadb.jdbc.Driver
+
+logging:
+  level:
+    org.hibernate.SQL: WARN

backend/src/main/resources/application.yaml

@@ -0,0 +1,25 @@
+spring:
+  application:
+    name: backend
+
+  jpa:
+    open-in-view: false
+    hibernate:
+      ddl-auto: validate
+    properties:
+      hibernate:
+        jdbc:
+          time_zone: UTC
+
+  jackson:
+    default-property-inclusion: non_null
+    time-zone: Europe/Madrid
+
+jwt:
+  expiration-ms: 3600000
+
+management:
+  endpoints:
+    web:
+      exposure:
+        include: health,info