Removing unused code. Adding docker file

Dockerfile

@@ -0,0 +1,9 @@
+FROM maven:3.5-jdk-8 AS build  
+COPY src /usr/src/app/src  
+COPY pom.xml /usr/src/app  
+RUN mvn -f /usr/src/app/pom.xml clean package
+
+FROM gcr.io/distroless/java  
+COPY --from=build /usr/src/app/target/nibl-api.jar /usr/app/nibl-api.jar
+
+ENTRYPOINT ["java","-jar","/usr/app/nibl-api.jar"]

src/main/java/com/nibl/api/ApplicationConfiguration.java

@@ -1,16 +1,7 @@
 package com.nibl.api;
 
-import java.util.ArrayList;
-import java.util.List;
-
-import org.apache.catalina.connector.Connector;
-import org.apache.commons.lang3.StringUtils;
-import org.apache.coyote.http11.Http11NioProtocol;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
-import org.springframework.beans.factory.annotation.Value;
-import org.springframework.boot.context.embedded.EmbeddedServletContainerFactory;
-import org.springframework.boot.context.embedded.tomcat.TomcatEmbeddedServletContainerFactory;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.web.servlet.config.annotation.CorsRegistry;
@@ -22,59 +13,6 @@ public class ApplicationConfiguration {
 
     private static Logger log = LoggerFactory.getLogger(ApplicationConfiguration.class);
 
-    public class EmbeddedTomcatConfiguration {
-
-        @Value("${server.additionalPorts}")
-        private String additionalPorts;
-
-        @Value("${server.ssl.key-store}")
-        private String absoluteKeyStore;
-
-        @Value("${server.ssl.key-store-password}")
-        private String keystorePass;
-
-        @Value("${server.ssl.keyStoreType}")
-        private String keystoreType;
-
-        @Value("${server.ssl.keyAlias}")
-        private String keyAlias;
-
-        @Bean
-        public EmbeddedServletContainerFactory servletContainer() {
-            TomcatEmbeddedServletContainerFactory tomcat = new TomcatEmbeddedServletContainerFactory();
-            Connector[] additionalConnectors = this.additionalConnector();
-            if (additionalConnectors != null && additionalConnectors.length > 0) {
-                tomcat.addAdditionalTomcatConnectors(additionalConnectors);
-            }
-            return tomcat;
-        }
-
-        private Connector[] additionalConnector() {
-            if (StringUtils.isBlank(this.additionalPorts)) {
-                return null;
-            }
-            String[] ports = this.additionalPorts.split(",");
-            List<Connector> result = new ArrayList<>();
-            for (String port : ports) {
-                Connector connector = new Connector("org.apache.coyote.http11.Http11NioProtocol");
-                Http11NioProtocol protocol = (Http11NioProtocol) connector.getProtocolHandler();
-
-                connector.setScheme("https");
-                connector.setPort(Integer.valueOf(port));
-                connector.setSecure(true);
-
-                protocol.setSSLEnabled(true);
-                protocol.setKeystoreFile(absoluteKeyStore);
-                protocol.setKeystorePass(keystorePass);
-                protocol.setKeystoreType(keystoreType);
-                protocol.setKeyAlias(keyAlias);
-
-                result.add(connector);
-            }
-            return result.toArray(new Connector[] {});
-        }
-    }
-
     @Bean
     public WebMvcConfigurer corsConfigurer() {
         return new WebMvcConfigurerAdapter() {