diff --git a/README.md b/README.md
index 97cc73f..d0b6004 100644
--- a/README.md
+++ b/README.md
@@ -9,3 +9,11 @@ rendered front-end.
 npm install
 npm run watch
 ```
+
+## Running on a custom port
+
+```
+export SEALIOUS_PORT=8888
+export SEALIOUS_BASE_URL="https://888.dep.sealcode.org"
+npm run watch
+```
diff --git a/package.json b/package.json
index db8702f..eb8451c 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
 		"build": "npm run build:back && npm run build:front",
 		"watch:back": "tsc --watch -p src/back",
 		"watch:front": "webpack --watch",
-		"watch": "tmux new-session -d \"printf '\\033]2;%s\\033\\' 'watch:back' && npm run watch:back\" && tmux split-window -d \"printf '\\033]2;%s\\033\\' 'server' && nodemon .\" && tmux split-window -d \"printf '\\033]2;%s\\033\\' 'watch:front' && npm run watch:front\"  && tmux select-layout even-horizontal && tmux set -g pane-border-status top && tmux attach",
+		"watch": "tmux new-session -d \"printf '\\033]2;%s\\033\\' 'watch:back' && npm run watch:back\" && tmux split-window -d \"printf '\\033]2;%s\\033\\' 'server' && SEALIOUS_PORT=$SEALIOUS_PORT SEALIOUS_BASE_URL=$SEALIOUS_BASE_URL nodemon .\" && tmux split-window -d \"printf '\\033]2;%s\\033\\' 'watch:front' && npm run watch:front\"  && tmux select-layout even-horizontal && tmux set -g pane-border-status top && tmux attach",
 		"test-reports": "npm run build && rm -fr .xunit coverage && docker-compose up -d db mailcatcher  && npm run test -- --cover --test-report",
 		"cover-html": "npm run test-reports -- --cover-html && xdg-open coverage/lcov-report/index.html"
 	},
diff --git a/src/back/app.ts b/src/back/app.ts
index 796478d..fef92f0 100644
--- a/src/back/app.ts
+++ b/src/back/app.ts
@@ -4,6 +4,13 @@ import { App } from "sealious";
 import tasks from "./collections/tasks";
 const locreq = _locreq(__dirname);
 
+const PORT = process.env.SEALIOUS_PORT
+	? parseInt(process.env.SEALIOUS_PORT)
+	: 8080;
+const base_url = process.env.SEALIOUS_BASE_URL || `http://localhost:${PORT}`;
+
+console.log(process.env);
+
 export default class TheApp extends App {
 	config = {
 		upload_path: locreq.resolve("uploaded_files"),
@@ -19,13 +26,16 @@ export default class TheApp extends App {
 		logger: {
 			level: <const>"info",
 		},
+		"www-server": {
+			port: PORT,
+		},
 	};
 	manifest = {
 		name: "Sealious Playground",
 		logo: resolve(__dirname, "../assets/logo.png"),
 		version: "0.0.1",
 		default_language: "en",
-		base_url: "localhost:8080",
+		base_url,
 		admin_email: "admin@example.com",
 		colors: {
 			primary: "#5294a1",