set custom port trough env variables. sometimes user may need to use host network where some other services may already use 80,443,81 ports

Author: beniamin

backend/internal/nginx.js

@@ -240,6 +240,8 @@ const internalNginx = {
 
 			// Set the IPv6 setting for the host
 			host.ipv6 = internalNginx.ipv6Enabled();
+			host.http_port = internalNginx.getHttpPort();
+			host.https_port = internalNginx.getHttpsPort();
 
 			locationsPromise.then(() => {
 				renderEngine
@@ -285,6 +287,7 @@ const internalNginx = {
 			}
 
 			certificate.ipv6 = internalNginx.ipv6Enabled();
+			certificate.http_port = internalNginx.getHttpPort();
 
 			renderEngine
 				.parseAndRender(template, certificate)
@@ -432,6 +435,27 @@ const internalNginx = {
 
 		return true;
 	},
+
+	/**
+	 * @returns {number}
+	 */
+	getHttpPort: () => {
+		return Number.parseInt(process.env.HTTP_PORT, 10) || 80;
+	},
+
+	/**
+	 * @returns {number}
+	 */
+	getHttpsPort: () => {
+		return Number.parseInt(process.env.HTTPS_PORT, 10) || 443;
+	},
+
+	/**
+	 * @returns {number}
+	 */
+	getWebUiPort: () => {
+		return Number.parseInt(process.env.WEB_UI_PORT, 10) || 81;
+	},
 };
 
 export default internalNginx;

backend/templates/_listen.conf

@@ -1,15 +1,15 @@
-  listen 80;
+  listen {{ http_port }};
 {% if ipv6 -%}
-  listen [::]:80;
+  listen [::]:{{ http_port }};
 {% else -%}
-  #listen [::]:80;
+  #listen [::]:{{ http_port }};
 {% endif %}
 {% if certificate -%}
-  listen 443 ssl;
+  listen {{ https_port }} ssl;
 {% if ipv6 -%}
-  listen [::]:443 ssl;
+  listen [::]:{{ https_port }} ssl;
 {% else -%}
-  #listen [::]:443;
+  #listen [::]:{{ https_port }};
 {% endif %}
 {% endif %}
   server_name {{ domain_names | join: " " }};

backend/templates/default.conf

@@ -5,11 +5,11 @@
 # Skipping output, congratulations page configration is baked in.
 {%- else %}
 server {
-  listen 80 default;
+  listen {{ http_port }} default;
 {% if ipv6 -%}
-  listen [::]:80 default;
+  listen [::]:{{ http_port }} default;
 {% else -%}
-  #listen [::]:80 default;
+  #listen [::]:{{ http_port }} default;
 {% endif %}
   server_name default-host.localhost;
   access_log /data/logs/default-host_access.log combined;

backend/templates/letsencrypt-request.conf

@@ -1,9 +1,9 @@
 {% include "_header_comment.conf" %}
 
 server {
-  listen 80;
+  listen {{ http_port }};
 {% if ipv6 -%}
-  listen [::]:80;
+  listen [::]:{{ http_port }};
 {% endif %}
 
   server_name {{ domain_names | join: " " }};

docker/rootfs/etc/s6-overlay/s6-rc.d/prepare/60-ports.sh

@@ -0,0 +1,39 @@
+#!/command/with-contenv bash
+# shellcheck shell=bash
+
+set -e
+
+log_info 'Ports ...'
+
+# Default ports
+HTTP_PORT=${HTTP_PORT:-80}
+HTTPS_PORT=${HTTPS_PORT:-443}
+WEB_UI_PORT=${WEB_UI_PORT:-81}
+
+process_folder () {
+	FILES=$(find "$1" -type f -name "*.conf")
+
+	for FILE in $FILES
+	do
+		echo "- ${FILE}"
+		# Replace HTTP port
+		sed -i -E "s/listen 80([^0-9]|$)/listen ${HTTP_PORT}\1/g" "$FILE"
+		sed -i -E "s/listen \[::\]:80([^0-9]|$)/listen [::]:${HTTP_PORT}\1/g" "$FILE"
+		sed -i -E "s/set \$port \"80\"/set \$port \"${HTTP_PORT}\"/g" "$FILE"
+
+		# Replace HTTPS port
+		sed -i -E "s/listen 443([^0-9]|$)/listen ${HTTPS_PORT}\1/g" "$FILE"
+		sed -i -E "s/listen \[::\]:443([^0-9]|$)/listen [::]:${HTTPS_PORT}\1/g" "$FILE"
+		sed -i -E "s/set \$port \"443\"/set \$port \"${HTTPS_PORT}\"/g" "$FILE"
+
+		# Replace Web UI port
+		sed -i -E "s/listen 81([^0-9]|$)/listen ${WEB_UI_PORT}\1/g" "$FILE"
+		sed -i -E "s/listen \[::\]:81([^0-9]|$)/listen [::]:${WEB_UI_PORT}\1/g" "$FILE"
+	done
+
+	# ensure the files are still owned by the npm user
+	chown -R "$PUID:$PGID" "$1"
+}
+
+process_folder /etc/nginx/conf.d
+process_folder /data/nginx

docs/src/advanced-config/index.md

@@ -237,4 +237,21 @@ Setting these environment variables will create the default user on startup, ski
     environment:
       INITIAL_ADMIN_EMAIL: my@example.com
       INITIAL_ADMIN_PASSWORD: mypassword1
+
+## Custom Ports
+
+If you need to change the default ports that NPM listens on (80 for HTTP, 443 for HTTPS, and 81 for the Web UI), you can do so by setting environment variables. Note that you must also update your Docker port mappings to match these internal ports.
+
+```yml
+    ports:
+      - '8080:8080' # Public HTTP Port
+      - '8443:8443' # Public HTTPS Port
+      - '8181:8181' # Admin Web Port
+    environment:
+      HTTP_PORT: 8080
+      HTTPS_PORT: 8443
+      WEB_UI_PORT: 8181
 ```
+
+> [!IMPORTANT]
+> When changing these environment variables, the internal Nginx configuration will be updated to listen on these new ports. Your Docker `ports` mapping must use these new ports as the container-side port (the second number).