Add Apache Tomcat webserver topic (#723)

README.md

@@ -285,7 +285,14 @@ We cover a wide range of DevOps topics in our content library, explore them unde
         <td>IIS</td>
         <td><a href="./topics/iis/">iis</a></td>
         <td>📖 <a href="https://learn.microsoft.com/en-us/iis/">learn.microsoft.com/iis</a></td>
-        <td>⏩ <a href="./topics/iis/basic/">IIS Basics</a></td>
+        <td>✔️ <a href="./topics/iis/basic/">IIS Basics</a></td>
+    </tr>
+    <tr>
+        <td><img height="28" width="32" src="https://tomcat.apache.org/res/images/tomcat.png" /></td>
+        <td>Apache Tomcat</td>
+        <td><a href="./topics/apachetomcat/">tomcat</a></td>
+        <td>📖 <a href="https://tomcat.apache.org/">tomcat.apache.org</a></td>
+        <td>✔️ <a href="./topics/apachetomcat/basic/">Tomcat Basics</a></td>
     </tr>
 </table>
 

topics/apachetomcat/README.md

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+# Apache Tomcat
+
+## 1. What is Apache Tomcat?
+
+### Overview
+
+Apache Tomcat (called "Tomcat" for short) is a free and open-source implementation of the Jakarta Servlet, Jakarta Expression Language, and WebSocket technologies. It provides a "pure Java" HTTP web server environment in which Java code can also run. Thus it is a Java web application server, although not a full JEE application server.
+Tomcat is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation, released under the Apache License 2.0 license.
+
+Source: https://en.wikipedia.org/wiki/Apache_Tomcat
+
+### Official Website of Apache Tomcat
+
+- https://tomcat.apache.org/
+
+### Official Documentation of Apache Tomcat
+
+- https://tomcat.apache.org/tomcat-10.1-doc/
+
+### What you can do with Apache Tomcat
+
+- Host Java-based web applications.
+- Implement and run Java Servlet and JSP technologies.
+- Lightweight and highly customizable deployment platform.
+- See details at: https://tomcat.apache.org/tomcat-10.1-doc/introduction.html
+
+---
+
+## 2. Prerequisites
+
+- Basic knowledge of Java and web server technologies.
+- Java Development Kit (JDK) installed on your system.
+
+---
+
+## 3. Installation
+
+### How to Install Apache Tomcat?
+
+1. **Download Apache Tomcat**:
+
+   - Visit the official [Apache Tomcat Downloads](https://tomcat.apache.org/download-10.cgi) page.
+   - Choose the version that matches your needs (e.g., Tomcat 10.1).
+
+2. **Install Java**:
+
+   - Ensure JDK is installed on your system. Apache Tomcat requires Java to run.
+   - [Install JDK Guide](https://docs.oracle.com/en/java/javase/17/install/overview-jdk-installation.html)
+
+3. **Extract and Configure Tomcat**:
+
+   - Extract the downloaded archive to a desired directory.
+   - Set the `CATALINA_HOME` environment variable to the Tomcat installation path.
+
+4. **Start Tomcat**:
+
+   - Navigate to the `bin` directory of your Tomcat installation.
+   - Run `startup.bat` (Windows) or `./startup.sh` (Linux/Mac).
+
+5. **Verify Installation**:
+   - Open a browser and go to `http://localhost:8080`. You should see the Tomcat welcome page.
+
+---
+
+## 4. Basics of Apache Tomcat
+
+### Get started with Apache Tomcat
+
+- https://tomcat.apache.org/tomcat-10.1-doc/setup.html
+
+### Apache Tomcat quick start guide
+
+- Set up and deploy your first servlet or JSP application:
+  - [Getting Started Guide](https://tomcat.apache.org/tomcat-10.1-doc/appdev/index.html)
+
+### Apache Tomcat Hands-On
+
+- See: [basic](./basic/)
+
+---
+
+## 5. More...
+
+### Apache Tomcat Cheatsheet
+
+- https://www.javacodegeeks.com/starting-with-apache-tomcat-cheatsheet.html
+
+### Recommended Books
+
+- **Tomcat: The Definitive Guide** by Jason Brittain.
+- **Professional Apache Tomcat 8** by Vivek Chopra, et al.

topics/apachetomcat/basic/README.md

@@ -0,0 +1,47 @@
+# Apache Tomcat Basics
+
+This section covers the fundamental concepts and steps to get started with Apache Tomcat. Learn how to set up, configure, and deploy web applications.
+
+---
+
+## 1. Getting Started with Apache Tomcat
+
+### Starting the Server
+
+1. Open the terminal and navigate to the `bin` directory of your Tomcat installation.
+2. Run the startup script:
+   - **Windows**: `startup.bat`
+   - **Linux/Mac**: `./startup.sh`
+
+### Stopping the Server
+
+1. Navigate to the `bin` directory.
+2. Run the shutdown script:
+   - **Windows**: `shutdown.bat`
+   - **Linux/Mac**: `./shutdown.sh`
+
+---
+
+## 2. Configuring Apache Tomcat
+
+### Change the Default Port
+
+1. Open the `server.xml` file located in the `conf` directory.
+2. Locate the `<Connector>` element and change the `port` attribute:
+
+```xml
+  <Connector port="8080" protocol="HTTP/1.1"
+             connectionTimeout="20000"
+             redirectPort="8443" />
+```
+
+---
+
+## 3. Deploying a Sample Application
+
+- Deploy a Pre-Built `.war` File
+- Download a sample `.war` file
+  - Download the sample application Sample Web Application at https://tomcat.apache.org/tomcat-10.1-doc/appdev/sample/
+- Deploy to Tomcat
+  - Copy the `.war` file into the webapps directory of your Tomcat installation.
+  - Access the Application: Open a browser and navigate to http://localhost:8080/sample.