Update project structure

server/build.gradle

@@ -0,0 +1,18 @@
+plugins {
+    id 'application'
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation 'junit:junit:4.13.1'
+    implementation 'com.google.guava:guava:30.0-jre'
+}
+
+tasks.named("jar") {
+    manifest {
+        attributes("Implementation-Title": rootProject.name, "Implementation-Version": project.version, "Main-Class": "com.example.redes.ServerApp")
+    }
+}