Add pipenv support

Pipfile

@@ -0,0 +1,23 @@
+[[source]]
+name = "pypi"
+url = "https://pypi.org/simple"
+verify_ssl = true
+
+[dev-packages]
+
+[packages]
+python-socketio = ">=4.3.1"
+pystray = ">=0.14.4"
+aiohttp = ">=3.6.2"
+aiohttp-jinja2 = ">=1.2.0"
+python-ndn = "==0.2b2.post1"
+Jinja2 = ">=2.10.3"
+Pillow = ">=6.1.0"
+
+[requires]
+python_version = "3.8"
+
+[scripts]
+app = "python app.py"
+main = "python main.py"
+

README.md

@@ -14,17 +14,32 @@ python3.6 -m venv ./venv
 ./venv/bin/python -m pip install -r requirements.txt
 ```
 
+Pipenv:
+Please notice that currently pipenv does not work with py2app.
+Also, the specified python version is 3.8.
+```bash
+pipenv install
+```
+
 Execute
 =======
 HTTP server:
 ```bash
 ./venv/bin/python app.py
 ```
+or
+```bash
+pipenv run app
+```
 
 Tray menu:
 ```bash
 ./venv/bin/python main.py
 ```
+or
+```bash
+pipenv run main
+```
 
 Generate OSX App
 ================

requirements.txt

@@ -4,4 +4,4 @@ pystray>=0.14.4
 Pillow>=6.1.0
 aiohttp>=3.6.2
 aiohttp-jinja2>=1.2.0
-python-ndn>=0.2a2
+python-ndn>=0.2b2.post1