Added a Bundle that automatically registers the servlet.

.gitignore

@@ -2,5 +2,4 @@
 /src/main/webapp/dist
 /src/main/webapp/node_modules
 /src/main/webapp/package-lock.json
-/src/main/resources/org/marmelo/dropwizard/metrics/bundle.js
-/src/main/resources/org/marmelo/dropwizard/metrics/index.html
+/src/main/resources/org/marmelo/dropwizard/metrics/*

pom.xml

@@ -17,11 +17,22 @@
         <dropwizard.version>1.3.6</dropwizard.version>
     </properties>
 
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>io.dropwizard</groupId>
+                <artifactId>dropwizard-bom</artifactId>
+                <version>${dropwizard.version}</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
     <dependencies>
         <dependency>
-            <groupId>javax.servlet</groupId>
-            <artifactId>javax.servlet-api</artifactId>
-            <version>3.1.0</version>
+            <groupId>io.dropwizard</groupId>
+            <artifactId>dropwizard-core</artifactId>
             <scope>provided</scope>
         </dependency>
     </dependencies>

src/main/java/org/marmelo/dropwizard/metrics/bundles/MetricsUIBundle.java

@@ -0,0 +1,72 @@
+/*
+ * MIT License (MIT)
+ *
+ * Copyright (c) 2018 Rafael Marmelo
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package org.marmelo.dropwizard.metrics.bundles;
+
+import io.dropwizard.Bundle;
+import io.dropwizard.setup.Bootstrap;
+import io.dropwizard.setup.Environment;
+import org.marmelo.dropwizard.metrics.servlets.MetricsUIServlet;
+
+/**
+ * Dropwizard Metrics UI Bundle.
+ *
+ * @author Rafael Marmelo
+ * @since 1.0
+ */
+public class MetricsUIBundle implements Bundle {
+
+    /**
+     * The servlet mapping.
+     */
+    private final String mapping;
+
+    /**
+     * Creates a new Metrics UI Bundle.
+     *
+     * The UI will be deployed by default at "/admin" path.
+     */
+    public MetricsUIBundle() {
+        this("/admin/*");
+    }
+    /**
+     * Creates a new Metrics UI Bundle.
+     *
+     * @param mapping the path where to deploy the UI ("/admin/*" by default).
+     */
+    public MetricsUIBundle(final String mapping) {
+        this.mapping = mapping;
+    }
+
+    @Override
+    public void initialize(final Bootstrap<?> bootstrap) {
+        // empty
+    }
+
+    @Override
+    public void run(final Environment environment) {
+        environment.admin()
+                .addServlet("Dropwizard Metrics UI", new MetricsUIServlet())
+                .addMapping(this.mapping);
+    }
+}

src/main/java/org/marmelo/dropwizard/metrics/MetricsUIServlet.java → src/main/java/org/marmelo/dropwizard/metrics/servlets/MetricsUIServlet.java

@@ -21,7 +21,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-package org.marmelo.dropwizard.metrics;
+package org.marmelo.dropwizard.metrics.servlets;
 
 import java.io.BufferedReader;
 import java.io.IOException;