Also recreate the nginx container for testing

test/nginx/Dockerfile

@@ -0,0 +1,3 @@
+FROM linuxserver/openssh-server:9.1_p1-r2-ls105
+
+RUN apk add --no-cache rsync

test/test_image.sh

@@ -5,19 +5,22 @@ set -eu
 root_dir=$(readlink -f $(dirname $(realpath "$0"))/..)
 if ! [ -f "$root_dir"/id_rsa ]; then
   echo 'Generating SSH key'
-  ssh-keygen -t rsa -f "$root_dir"/id_rsa -q -N ''
+  ssh-keygen -t rsa -f "$root_dir/id_rsa" -q -N ''
 fi
 
 run_image() {
+  # Run the codefirst-docdeployer image with the given branch and command.
+  #
+  # The container will automatically be added to the same network as a container
+  # named 'nginx'. The codefirst-nginx container acts as a SSH server and will
+  # be started and stopped automatically. The SSH user, port and authorized
+  # keys are already configured.
   local branch=$1
-  local pubkey=$(<"$root_dir"/id_rsa.pub)
+  local pubkey=$(<"$root_dir/id_rsa.pub")
   shift
   docker network inspect codefirst &> /dev/null || docker network create codefirst
-  docker volume create --name=codefirst-docdeployer-drone
-  docker volume create --name=codefirst-docdeployer-docs
-  docker volume create --name=codefirst-nginx
-  nginx_id=$(docker run --rm -d -v codefirst-nginx:/usr/share/nginx --net=codefirst -e PUBLIC_KEY="$pubkey" -e USER_NAME=codefirst --hostname=nginx linuxserver/openssh-server)
-  sleep 1 # Wait to let the container start
+  nginx_id=$(docker run --rm -d -v codefirst-nginx:/usr/share/nginx --net=codefirst -e PUBLIC_KEY="$pubkey" -e USER_NAME=codefirst -e PUID=0 --hostname=nginx codefirst-nginx)
+  sleep 2 # Wait to let the container start
   docker run -v codefirst-docdeployer-drone:/drone/src \
     -v codefirst-docdeployer-docs:/docs \
     --net=codefirst \
@@ -30,8 +33,11 @@ run_image() {
     --rm codefirst-docdeployer \
     -c "sed -i 's/ssh/ssh -p 2222/g' /entrypoint.sh && sed -i 's/root@nginx/codefirst@nginx/g' /entrypoint.sh && $*"
   docker stop "$nginx_id"
+  docker volume rm codefirst-docdeployer-drone codefirst-docdeployer-docs
+  docker run --rm -i -v codefirst-nginx:/usr/share/nginx busybox find /usr/share/nginx
 }
 
 docker build -t codefirst-docdeployer "$root_dir"
+docker build -t codefirst-nginx "$root_dir/test/nginx"
 
 run_image main 'doxygen -g && /entrypoint.sh -b main -l . -t doxygen -d sourcecode_documentation'