diff --git a/Makefile b/Makefile
index f23781a..be476bb 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,15 @@
 #! make
 
-default: run
+include .env
+export
+
+default: local
 
 setup:
 	@if [ ! -d ".venv" ]; then python3 -m venv .venv && .venv/bin/pip install -r requirements.txt; fi
 
-run:
-	@.venv/bin/python octomode.py 
+local:
+	@.venv/bin/python octomode.py
+
+action:
+	@SCRIPT_NAME=${OCTOMODE_APPLICATION_ROOT} .venv/bin/gunicorn -b localhost:${OCTOMODE_PORTNUMBER} --reload octomode:APP
diff --git a/README.md b/README.md
index 96425de..0fdca92 100644
--- a/README.md
+++ b/README.md
@@ -81,21 +81,37 @@ You can clone this repository to run octomode on your own computer or server.
 
 `git clone https://git.vvvvvvaria.org/varia/octomode.git`
 
-`cd octomode`
+Install the dependencies.
+
+All the `python` dependencies are listed in `requirements.txt`
+
+To install them, you can run:
+
+`make setup`
+
+This creates a virtual environment at `.venv/` and installs all the dependencies here.
+
+Next to this, you also need to install `pandoc`.
 
-`make setup` (sets up a virtual environment and install the requirements, you only need to do this once)
+`sudo apt install pandoc`
+
+Now we need to configure *octomode*:
+
+`cd octomode`
 
 `nano .env` 
 
 Configure your environment, save the following configuration settings as to a file called `.env`:
 
 ```
+OCTOMODE_APPLICATION_ROOT=XXX
 OCTOMODE_PORTNUMBER=XXX
 OCTOMODE_PAD_URL=XXX
 OCTOMODE_PAD_API_URL=XXX
 OCTOMODE_PAD_API_KEY=XXX
 ```
 
+- **OCTOMODE_APPLICATION_ROOT**: *optional*, default: `/`
 - **OCTOMODE_PORTNUMBER**: *optional*, default: `5001`
 - **OCTOMODE_PAD_URL**: *optional*, default: `https://pad.vvvvvvaria.org/`
 - **OCTOMODE_PAD_API_URL**: *optional*, default: `https://pad.vvvvvvaria.org/api/1.2.15/`
@@ -105,25 +121,24 @@ OCTOMODE_PAD_API_KEY=XXX
 
 `make run` (runs the Flask application)
 
-Open the application at port `5001`, for example: <http://localhost:5001> or <http://mydomainname.ext:5001>.
+Open the application at port `5001`, for example: <http://localhost:5001> or <https://mydomainname.ext:5001>.
 
-### Dependencies
+## Install octomode with an URL prefix
 
-`python` dependencies are listed in `requirements.txt`
+If you want to install octomode with an URL prefix, like <https://mydomainname.ext/octomode/>, then you can use the gunicorn WSGI.
 
-To install them, you can run:
+If you have ran the `make setup` command already, then `gunicorn` is already installed.
 
-`make setup`
+Configure your application root URL in your `.env` file.
 
-This creates a virtual environment at `.venv/` and installs all the dependencies here.
+You can simply run *octomode* now with the following command to run it with `gunicorn` (and not the built-in Flask dev server):
 
-### Other configurations on the server
+`make action`
+
+### Dependencies
 
-* Configure the webserver to listen to the port of the flask application, for example with a subdomain
-* Expand the current https certificate for a subdomain
-* Restart nginx (`sudo service reload nginx`)
-* To keep the flask application running in the background: add a new config to supervisor (`cp /etc/supervisor/conf.d/previousexample.conf /etc/supervisor/conf.d/new.conf`)
-* Restart supervisor (`sudo service reload supervisor`)
+* pandoc
+* python dependencies, see: `requirements.txt`
 
 ## Use octomode locally
 
diff --git a/octomode.py b/octomode.py
index a0358e2..70409cd 100755
--- a/octomode.py
+++ b/octomode.py
@@ -1,6 +1,6 @@
 import os
 import json
-from flask import Flask, request, render_template, redirect
+from flask import Flask, request, render_template, redirect, url_for
 from urllib.request import urlopen
 from urllib.parse import urlencode
 
@@ -108,13 +108,13 @@ def index():
         exts = ['.md', '.css']
         for ext in exts:
             create_pad_on_first_run(name, ext)
-        return redirect(f"/{ name }/pad/")
+        return redirect(url_for("pad", name=name))
     else:
         return render_template('start.html', pad_url=APP.config['PAD_URL'])
 
 @APP.route('/<name>/')
 def main(name):
-    return redirect(f"/{ name }/pad")
+    return redirect(url_for("pad", name=name))
 
 @APP.route('/<name>/pad/')
 def pad(name):
diff --git a/requirements.txt b/requirements.txt
index 82264c5..b92dc15 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,6 +5,7 @@ MarkupSafe==2.0.1
 Werkzeug==2.0.2
 bleach==4.1.0
 click==8.0.3
+gunicorn==20.1.0
 importlib-metadata==4.10.1
 itsdangerous==2.0.1
 pkg-resources==0.0.0
diff --git a/templates/base.html b/templates/base.html
index ef81a70..db3da7b 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -21,20 +21,20 @@ window.addEventListener('load', function () {
   nav.id = 'nav';
 
   nav.innerHTML = `
-    <h1>{{ name }} <a href="/"><em class="octomode">in octomode</em></a></h1>
+    <h1>{{ name }} <a href="{{ url_for('index') }}"><em class="octomode">in octomode</em></a></h1>
     <div id="buttons">
 
-      <a href="/{{ name }}/pad"><button>pad</button></a> 
+      <a href="{{ url_for('pad', name=name) }}"><button>pad</button></a> 
       <span id="click_md" class="info" tabindex="1">🌐</span>
       <div id="show_md" class="hidden"><input type="text" name="pad" value="{{ pad_url }}/{{ name }}.md"></div>
 
-      <a href="/{{ name }}/stylesheet"><button>stylesheet</button></a> 
+      <a href="{{ url_for('stylesheet', name=name) }}"><button>stylesheet</button></a> 
       <span id="click_css" class="info" tabindex="1">🌐</span>
       <div id="show_css" class="hidden"><input type="text" name="pad" value="{{ pad_url }}/{{ name }}.css"></div>
 
-      <a href="/{{ name }}/html"><button>html</button></a>
+      <a href="{{ url_for('html', name=name) }}"><button>html</button></a>
 
-      <a href="/{{ name }}/pdf"><button>pdf</button></a>
+      <a href="{{ url_for('pdf', name=name) }}"><button>pdf</button></a>
     </div>`;
 
   document.body.insertBefore(nav, document.body.firstChild);
diff --git a/templates/start.html b/templates/start.html
index 8f2b08c..890a6c1 100644
--- a/templates/start.html
+++ b/templates/start.html
@@ -6,7 +6,7 @@
   <link rel="stylesheet" type="text/css" href="{{ url_for('static', filename='main.css') }}">
 </head>
 <body class="start-page">
-  <form action="/" method="POST">
+  <form action="{{ url_for('index') }}" method="POST">
     <h1><input type="submit" value="open"> <input type="text" name="name"> <em class="octomode">in octomode</em></h1>
   </form>
 </body>