diff --git a/gateway/Dockerfile b/gateway/Dockerfile
index 372661c..b91c9f4 100644
--- a/gateway/Dockerfile
+++ b/gateway/Dockerfile
@@ -1,4 +1,4 @@
-FROM harbor.supwisdom.com/institute/openjdk:8-jre
+FROM harbor.supwisdom.com/institute/openjdk:8-jre-alpine
 
 ENV ENABLE_JMX_SSL=false
 ENV JAVA_OPTS -Djava.security.egd=file:/dev/./urandom -Dspring.profiles.active=docker
diff --git a/gateway/src/main/java/com/supwisdom/institute/backend/gateway/security/core/userdetails/InMemeryUserDetailsService.java b/gateway/src/main/java/com/supwisdom/institute/backend/gateway/security/core/userdetails/InMemeryUserDetailsService.java
index 5dea61c..ae34f65 100644
--- a/gateway/src/main/java/com/supwisdom/institute/backend/gateway/security/core/userdetails/InMemeryUserDetailsService.java
+++ b/gateway/src/main/java/com/supwisdom/institute/backend/gateway/security/core/userdetails/InMemeryUserDetailsService.java
@@ -14,9 +14,6 @@
 import org.springframework.security.core.userdetails.UsernameNotFoundException;
 import org.springframework.security.crypto.password.PasswordEncoder;
 
-import com.supwisdom.institute.backend.common.core.transmit.user.User;
-import com.supwisdom.institute.backend.common.core.transmit.user.UserContext;
-
 import reactor.core.publisher.Mono;
 import lombok.extern.slf4j.Slf4j;
 
diff --git a/gateway/src/main/resources/application-docker.yml b/gateway/src/main/resources/application-docker.yml
index a8d7d4f..c0c3ae0 100644
--- a/gateway/src/main/resources/application-docker.yml
+++ b/gateway/src/main/resources/application-docker.yml
@@ -8,6 +8,10 @@
     trust-store: ${SSL_TRUSTSTORE_FILE:file:/certs/server/server.truststore}
     trust-store-password: ${SSL_TRUSTSTORE_PASSWORD:}
   tomcat: 
+    accept-count: ${SERVER_TOMCAT_ACCEPT_COUNT:100}
+    max-connections: ${SERVER_TOMCAT_MAX_CONNECTIONS:10000}
+    max-threads: ${SERVER_TOMCAT_MAX_THREADS:200}
+    min-spare-threads: ${SERVER_TOMCAT_MIN_SPARE_THREADS:10}
     accesslog: 
       enabled: ${TOMCAT_ACCESSLOG_ENABLED:false}
       buffered: ${TOMCAT_ACCESSLOG_BUFFERED:true}