diff --git a/docker-mods/nginx-proxy-manager/root/etc/cont-init.d/98-themepark b/docker-mods/nginx-proxy-manager/root/etc/cont-init.d/98-themepark
new file mode 100644
index 00000000..7d9b6396
--- /dev/null
+++ b/docker-mods/nginx-proxy-manager/root/etc/cont-init.d/98-themepark
@@ -0,0 +1,59 @@
+#!/usr/bin/with-contenv bash
+
+echo '--------------------------------------'
+echo '| Nginx Proxy Manager theme.park Mod |' 
+echo '--------------------------------------'
+
+APP_FILEPATH='/opt/nginx-proxy-manager/frontend/'
+
+# Display variables for troubleshooting 
+echo -e "Variables set:\\n\
+'APP_FILEPATH'=${APP_FILEPATH}\\n\
+'TP_DOMAIN'=${TP_DOMAIN}\\n\
+'TP_COMMUNITY_THEME'=${TP_COMMUNITY_THEME}\\n\
+'TP_SCHEME'=${TP_SCHEME}\\n\
+'TP_THEME'=${TP_THEME}\\n"
+
+# Set default
+if [[ -z ${TP_DOMAIN} ]]; then
+    echo 'No domain set, defaulting to theme-park.dev'
+    TP_DOMAIN='theme-park.dev'
+fi
+if [[ -z ${TP_SCHEME} ]]; then
+    echo 'No scheme set, defaulting to https'
+    TP_SCHEME='https'
+fi
+
+THEME_TYPE='theme-options'
+if [ "${TP_COMMUNITY_THEME}" = true ]; then
+    THEME_TYPE='community-theme-options'
+fi
+
+case ${TP_DOMAIN} in
+  *"github.io"*)
+  echo "Switching to github.io URL style"
+    TP_DOMAIN="${TP_DOMAIN}\/theme.park"
+    ;;
+esac
+
+if [[ -z ${TP_THEME} ]]; then
+    echo 'No theme set, defaulting to organizr'
+    TP_THEME='organizr'
+fi
+
+sed_file(){
+    sed -i "s/<\/head>/<link rel='stylesheet' href='${TP_SCHEME}:\/\/${TP_DOMAIN}\/css\/base\/nginx-proxy-manager\/nginx-proxy-manager-base.css'><\/head> /g" $1
+    sed -i "s/<\/head>/<link rel='stylesheet' href='${TP_SCHEME}:\/\/${TP_DOMAIN}\/css\/${THEME_TYPE}\/${TP_THEME}.css'><\/head> /g" $1
+    printf 'Stylesheet set to %s on %s\n\n' "${TP_THEME}" "$1"
+}
+
+# Adding stylesheets
+if ! grep -q "${TP_DOMAIN}/css/base" "${APP_FILEPATH}/index.html"; then
+    echo '---------------------------------------'
+    echo '| Adding the stylesheet to html files |'
+    echo '---------------------------------------'
+    find ${APP_FILEPATH} -type f -iname *.html | while read fname
+    do
+        sed_file $fname
+    done
+fi