Update Dockerfile

Dockerfile

@@ -1,29 +1,27 @@
 # STEP 1: Build stage
 FROM gradle:8-jdk17 AS build
 WORKDIR /home/gradle/src
-
-# Copy all project files
 COPY --chown=gradle:gradle . .
-
-# Run the 'jar' task defined in your build.gradle
+# Using the standard jar task from your build.gradle
 RUN gradle jar --no-daemon
 
 # STEP 2: Runtime stage
 FROM eclipse-temurin:17-jre
 WORKDIR /app
 
-# 1. Copy the JAR from the build stage
+# 1. Copy files from build
 COPY --from=build /home/gradle/src/build/libs/*.jar app.jar
-
-# 2. Copy your JSON configuration files
 COPY *.json .
 
-# 3. FIX DNS: Force the container to use Google's DNS
-RUN echo "nameserver 8.8.8.8" > /etc/resolv.conf
-
-# 4. Set permissions
+# 2. Permissions
 RUN chmod -R 777 /app
 EXPOSE 8000
 
-# 5. Start Java with DNS caching disabled to prevent "UnknownHost" sticking
-ENTRYPOINT ["java", "-Dsun.net.inetaddr.ttl=0", "-Dsun.net.inetaddr.negative.ttl=0", "-jar", "app.jar"]
+# 3. START COMMAND (The DNS Fix)
+# We tell the JVM to use Google's DNS directly and never cache failures.
+ENTRYPOINT ["java", \
+            "-Dsun.net.spi.nameserver.nameservers=8.8.8.8", \
+            "-Dsun.net.spi.nameserver.provider.1=dns", \
+            "-Dsun.net.inetaddr.ttl=0", \
+            "-Dsun.net.inetaddr.negative.ttl=0", \
+            "-jar", "app.jar"]