docs: documentation to create container image is added

docs/dev/build-image.md

@@ -1 +1,83 @@
 # Build a Container Image
+
+This guide describes how to build Docker containers that install the Wazuh Agent from package files. Two container
+setups are provided: one for RPM-based systems (RHEL) and another for DEB-based systems (Ubuntu).
+
+## Prerequisites
+
+- **Docker:** Ensure Docker is installed and running on your system.
+- **Data Directory:** Create a directory named `data` in your working folder and place the corresponding Wazuh Agent package:
+  - **RPM Container:** Place `wazuh-agent*.rpm` in the `data` folder.
+  - **DEB Container:** Place `wazuh-agent*.deb` in the `data` folder.
+
+## RPM-Based Container (RHEL)
+
+### Dockerfile
+
+```dockerfile
+FROM generic/rhel9
+
+# Copy the data directory containing the RPM package
+COPY data /tmp/data
+
+# Install the Wazuh Agent RPM, download and extract mitmproxy,
+# and attempt to stop/disable firewalld
+RUN rpm -i /tmp/data/wazuh-agent*.rpm && \
+    curl -L https://downloads.mitmproxy.org/11.0.0/mitmproxy-11.0.0-linux-x86_64.tar.gz -o /tmp/mitmproxy.tar.gz && \
+    tar -zxf /tmp/mitmproxy.tar.gz -C /usr/local/bin && \
+    (systemctl stop firewalld || true) && \
+    (systemctl disable firewalld || true)
+
+CMD ["/bin/bash"]
+```
+
+### Build and Run (RPM Container)
+
+1. **Build the Image:**
+
+    ```bash
+    docker build -t rpm-agent .
+    ```
+
+2. **Run the Container with a Custom Hostname:**
+
+    ```bash
+    docker run --hostname rpm-agent -it rpm-agent
+    ```
+
+## DEB-Based Container (Ubuntu)
+
+### Dockerfile
+
+```dockerfile
+FROM ubuntu:24.04
+
+# Update repositories and install required dependencies
+RUN apt-get update && apt-get install -y lsb-release adduser curl
+
+# Copy the data directory containing the DEB package
+COPY data /tmp/data
+
+# Install the Wazuh Agent DEB package
+RUN dpkg -i /tmp/data/wazuh-agent*.deb
+
+# Download and extract mitmproxy
+RUN curl -L https://downloads.mitmproxy.org/11.0.0/mitmproxy-11.0.0-linux-x86_64.tar.gz -o /tmp/mitmproxy.tar.gz && \
+    tar -zxf /tmp/mitmproxy.tar.gz -C /usr/local/bin
+
+CMD ["/bin/bash"]
+```
+
+### Build and Run (DEB Container)
+
+1. **Build the Image:**
+
+    ```bash
+    docker build -t deb-agent .
+    ```
+
+2. **Run the Container with a Custom Hostname:**
+
+    ```bash
+    docker run --hostname deb-agent -it deb-agent
+    ```