Added port configuration to deploy on railway

Dockerfile

@@ -4,9 +4,6 @@ RUN mvn clean package -DskipTests
 
 FROM eclipse-temurin:21-jre-alpine
 WORKDIR /alura-flix-api
-ARG DATABASE_PRO
-ARG DATABASE_TEST
-ARG JWT_SECRET
 COPY --from=build target/*.jar alura-flix-api.jar
 EXPOSE 8080
 

src/main/java/com/alura/aluraflixapi/infraestructure/railway/RailwayConfig.java

@@ -0,0 +1,13 @@
+package com.alura.aluraflixapi.infraestructure.railway;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class RailwayConfig {
+
+    @Bean
+    String getPort(){
+        return System.getenv("PORT");
+    }
+}