feat: Update NGINX App Protect docker build commands

This commit updates instances of docker build commands across the NGINX
App Protect WAF & DoS documentation sets to append a platform parameter.
Without it, Docker attempts to look for packages based on the
architecture of the system you're building the image on.

Author: ADubhlaoich

content/includes/nap-waf/build-nginx-image-cmd.md

@@ -10,7 +10,7 @@ To build the image, execute the following command in the directory containing th
 
 
 ```shell
-sudo docker build --no-cache \
+sudo docker build --no-cache --platform linux/amd64 \
   --secret id=nginx-crt,src=nginx-repo.crt \
   --secret id=nginx-key,src=nginx-repo.key \
   -t nginx-app-protect-5 .

content/nap-dos/deployment-guide/learn-about-deployment.md

@@ -1405,7 +1405,7 @@ You need root permissions to execute the following steps.
 6. Create a Docker image:
 
     ```shell
-    docker build --no-cache -t app-protect-dos .
+    docker build --no-cache --platform linux/amd64 -t app-protect-dos .
     ```
 
     The `--no-cache` option tells Docker to build the image from scratch and ensures the installation of the latest version of NGINX Plus and NGINX App Protect DoS. If the Dockerfile was previously used to build an image without the `--no-cache` option, the new image uses versions from the previously built image from the Docker cache.
@@ -1966,13 +1966,13 @@ Make sure to replace upstream and proxy pass directives in this example with rel
     For CentOS:
 
     ```shell
-    docker build --no-cache -t app-protect-dos .
+    docker build --no-cache --platform linux/amd64 -t app-protect-dos .
     ```
 
     For RHEL:
 
     ```shell
-    docker build --build-arg RHEL_ORGANIZATION=${RHEL_ORGANIZATION} --build-arg RHEL_ACTIVATION_KEY=${RHEL_ACTIVATION_KEY} --no-cache -t app-protect-dos .
+    docker build --platform linux/amd64 --build-arg RHEL_ORGANIZATION=${RHEL_ORGANIZATION} --build-arg RHEL_ACTIVATION_KEY=${RHEL_ACTIVATION_KEY} --no-cache -t app-protect-dos .
     ```
 
     The `--no-cache` option tells Docker to build the image from scratch and ensures the installation of the latest version of NGINX Plus and NGINX App Protect DoS. If the Dockerfile was previously used to build an image without the `--no-cache` option, the new image uses versions from the previously built image from the Docker cache.

content/nap-waf/v4/admin-guide/install.md

@@ -939,7 +939,7 @@ If a user other than **nginx** is to be used, note the following:
     - For Oracle Linux/Debian/Ubuntu/Alpine/Amazon Linux:
 
         ```shell
-        DOCKER_BUILDKIT=1 docker build --no-cache --secret id=nginx-crt,src=nginx-repo.crt --secret id=nginx-key,src=nginx-repo.key -t app-protect .
+        DOCKER_BUILDKIT=1 docker build --no-cache --platform linux/amd64 --secret id=nginx-crt,src=nginx-repo.crt --secret id=nginx-key,src=nginx-repo.key -t app-protect .
         ```
 
         The `DOCKER_BUILDKIT=1` enables `docker build` to recognize the `--secret` flag which allows the user to pass secret information to be used in the Dockerfile for building docker images in a safe way that will not end up stored in the final image. This is a recommended practice for the handling of the certificate and private key for NGINX repository access (`nginx-repo.crt` and `nginx-repo.key` files). More information [here](https://docs.docker.com/engine/reference/commandline/buildx_build/#secret).
@@ -1289,7 +1289,7 @@ You need root permissions to execute the following steps.
     - For Oracle Linux/Debian/Ubuntu/Alpine/Amazon Linux:
 
         ```shell
-        DOCKER_BUILDKIT=1 docker build --no-cache --secret id=nginx-crt,src=nginx-repo.crt --secret id=nginx-key,src=nginx-repo.key -t app-protect-converter .
+        DOCKER_BUILDKIT=1 docker build --no-cache --platform linux/amd64 --secret id=nginx-crt,src=nginx-repo.crt --secret id=nginx-key,src=nginx-repo.key -t app-protect-converter .
         ```
 
         The `DOCKER_BUILDKIT=1` enables `docker build` to recognize the `--secret` flag which allows the user to pass secret information to be used in the Dockerfile for building docker images in a safe way that will not end up stored in the final image. This is a recommended practice for the handling of the certificate and private key for NGINX repository access (`nginx-repo.crt` and `nginx-repo.key` files). More information [here](https://docs.docker.com/engine/reference/commandline/buildx_build/#secret).