Initial project setup: CI, Docker & configs

Add project bootstrap for build, CI/CD, and local development. Introduces Maven Wrapper (mvnw, mvnw.cmd, .mvn/wrapper), multi-stage Dockerfile, docker-compose files (compose.yaml, docker-compose.dev.yml), .env, banner and README. Adds Gitea Actions workflow to build, test and push container images. Update application.yml (port -> 8090, virtual threads, API versioning, management/actuator/prometheus settings, Steam API config) and add application-dev.yml for local overrides. Extend pom.xml with caching, observability (actuator, micrometer/prometheus), testing/dev dependencies (testcontainers, devtools, additional spring test modules) to support CI and local testing.

src/main/resources/application.yml

@@ -3,35 +3,45 @@ spring:
     name: tbp-core-service
   profiles:
     active: prod
-  datasource:
-    url: jdbc:postgresql://${DB_HOST}:5432/tbp_core
-    username: ${DB_USER}
-    password: ${DB_PASS}
   jpa:
     open-in-view: true
-    hibernate:
-      ddl-auto: validate
   flyway:
     enabled: true
     baseline-on-migrate: true
     locations: classpath:db/migration
+  threads:
+    virtual:
+      enabled: true
+  mvc:
+    apiversion:
+      use:
+        query-parameter: version
+      default: "1.0"
+      supported: 1.0, 2,0
 
 server:
-  port: 8081
+  port: 8090
 
 management:
   endpoints:
     web:
       exposure:
         include: health, prometheus, metrics
-
+    endpoint:
+      health:
+        show-details: always
+    prometheus:
+      metrics:
+        export:
+          enabled: true
 security:
   jwt:
     secret: ${JWT_SECRET}
-
 app:
   cors:
     allowed-origins: "https://tbp.andreas-dahm.eu"
-
-internal:
-  api-key: ${INTERNAL_API_KEY}
+  steam:
+    api-key: ${STEAM_API_KEY}
+    playerService-url: https://api.steampowered.com/IPlayerService/GetOwnedGames/v1/
+    storeService-url: https://api.steampowered.com/IStoreService/GetAppList/v1/
+    imageService-url: https://cdn.cloudflare.steamstatic.com/steam/apps/