feat: add exercise boilerplate

Author: Genyus

.gitignore

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+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### IntelliJ IDEA ###
+.idea/
+*.iws
+*.iml
+*.ipr
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

.mvn/wrapper/maven-wrapper.jar

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+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.9.1/apache-maven-3.9.1-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar

.mvn/wrapper/maven-wrapper.properties

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-# Java Exercise Template
-This template repository is used to create autograded Java exercise repositories for CBF Academy bootcamps. It includes a GitHub Classroom autograding workflow that scores student submissions on functionality and code quality by executing unit tests and submitting the code changes for review by an automated agent.
-
-## Usage
-
-1. Create a new repository for the exercise, with the following settings:
-    - Template: Select this repository
-    - Name: Use the `java-exercises-[exercise name]` naming convention, e.g. `java-exercises-spring-boot`
-    - Visibility: Public (needed for Classroom)
-2. After initialising, navigate to the repo settings and set as a template, so it can be used for assignments
-3. Commit README, Maven assets, starter code and unit tests to the main branch
-4. Create a solutions branch and commit any reference solutions code to it
-5. Modify the `MAX_TESTS` environment variable to reflect the total number of tests available
-6. Push all changes
-
-## Testing
-
-1. Create a new Classroom assignment using the exercise repo as the starter template, with the following settings
-   - Repository visibility: Private
-   - Grant students admin access to their repository: Disabled
-   - Copy the default branch only: Enabled
-   - Supported editor: Don't use an online IDE
-   - Protected file paths: `.github/**/*`, `**/test/**/*`
-   - Enable feedback pull requests: Enabled
-2. Accept the assignment from a test account.
-3. Commit and push
-4. Review the Actions output and Feedback PR comment to ensure everything operates as expected
+# Client-Server Architecture
+
+[![Java Language](https://img.shields.io/badge/PLATFORM-OpenJDK-3A75B0.svg?style=for-the-badge)][1]
+[![JUnit5 Testing Framework](https://img.shields.io/badge/testing%20framework-JUnit5-26A162.svg?style=for-the-badge)][2]
+[![Maven Dependency Manager](https://img.shields.io/badge/dependency%20manager-Maven-AA215A.svg?style=for-the-badge)][3]
+
+The goal of these programming exercises is to practise:
+- communication with a remote server
+- using the `java.net.*` package capabilities
+
+For this assignment, we've provided the starter project above.
+
+## :earth_africa: Using URLs
+
+Modify [App.java](src/main/java/com/cbfacademy/App.java) to connect to the main CBF website at https://codingblackfemales.com, then read its content line by line and print each line to the screen.
+
+You will need to use `HttpURLConnection`, `BufferedReader` and `InputStreamReader` classes.
+
+Whenever possible, use the try-with-resources construct we saw earlier in the course, and ensure to release all resources.
+
+## :phone: Client & Server
+
+Create a simple program with two classes:
+- a `ExerciseServer` class which uses a `ServerSocket` to listen for connections on `localhost:4040`, then prints message it receives on the screen.
+- a `ExerciseClient` class which requests a connection to server, sends a simple text message to the server.
+
+Ensure to release all resources at the end of your program.
+
+[1]: https://docs.oracle.com/javase/21/docs/api/index.html
+[2]: https://junit.org/junit5/
+[3]: https://maven.apache.org/