dockerize running app

Author: machow

.env.example

@@ -0,0 +1 @@
+PORT=8000

.gitignore

@@ -0,0 +1 @@
+.env

Dockerfile

@@ -0,0 +1,15 @@
+FROM python:3.7.7-buster
+
+WORKDIR /app
+
+COPY ./requirements.txt /app/requirements.txt
+
+RUN pip install -r requirements.txt
+
+COPY . ./
+
+RUN chmod u+x setup.sh && PORT=8000 ./setup.sh
+
+# expanding shell variables in CMD is tricky, see
+# https://stackoverflow.com/questions/23071214/use-environment-variables-in-cmd
+CMD ["streamlit", "run", "--server.port", "8000", "app.py"]

README.md

@@ -7,7 +7,19 @@ To test the app locally just run:
 
 This will open a browser window with the app running.
 
+### Developing with docker
+
+Copy `.env.example` to be `.env` and run the container.
+
+```bash
+cp .env.example .env
+docker-compose up
+```
+
+You should be able to view the app via `localhost:8000`. If you want to change the
+port, then set `PORT` in the `.env` file.
+
 ## Deployment
 **Before you push your changes to master make sure that everything works in development mode.**
 
-Changes merged to `master` will be automatically deployed to [pennchime.herokuapp.com](https://pennchime.herokuapp.com/).
+Changes merged to `master` will be automatically deployed to [pennchime.herokuapp.com](https://pennchime.herokuapp.com/).

docker-compose.yml

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+version: '3.1'
+
+services:
+  app:
+    build: .
+    restart: always
+    ports:
+      - "${PORT}:8000"