diff --git a/Dockerfile b/Dockerfile
index 8bf22f5..519bbbe 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@ COPY src ./src
 RUN gradle bootJar --no-daemon -x test
 
 # Runtime stage
-FROM openjdk:17-slim
+FROM eclipse-temurin:17-jre
 
 WORKDIR /app
 
diff --git a/src/main/resources/application.yaml b/src/main/resources/application.yaml
index 3df661e..8ebca34 100644
--- a/src/main/resources/application.yaml
+++ b/src/main/resources/application.yaml
@@ -1,14 +1,14 @@
 spring:
   datasource:
-    url: jdbc:mysql://${DB_HOST}:${DB_PORT}/${DB_NAME}?allowPublicKeyRetrieval=true
-    username: ${DB_USER}
-    password: ${DB_PASSWORD}
+    url: jdbc:mysql://${DB_HOST:localhost}:${DB_PORT:3306}/${DB_NAME:seminar2025}?allowPublicKeyRetrieval=true
+    username: ${DB_USER:user}
+    password: ${DB_PASSWORD:somepassword}
     driver-class-name: com.mysql.cj.jdbc.Driver
   data:
     redis:
-      host: ${REDIS_HOST}
-      port: ${REDIS_PORT}
-      password: ${REDIS_PASSWORD}
+      host: ${REDIS_HOST:localhost}
+      port: ${REDIS_PORT:6379}
+      password: ${REDIS_PASSWORD:}
   flyway:
     enabled: true