From c848b554fa08fac23cf42ca84ed32eda7065d4a1 Mon Sep 17 00:00:00 2001
From: Michael Chow <machow@princeton.edu>
Date: Sat, 14 Mar 2020 20:36:54 -0400
Subject: [PATCH] dockerize running app

---
 .env.example       |  1 +
 .gitignore         |  1 +
 Dockerfile         | 15 +++++++++++++++
 README.md          | 14 +++++++++++++-
 docker-compose.yml |  8 ++++++++
 5 files changed, 38 insertions(+), 1 deletion(-)
 create mode 100644 .env.example
 create mode 100644 .gitignore
 create mode 100644 Dockerfile
 create mode 100644 docker-compose.yml

diff --git a/.env.example b/.env.example
new file mode 100644
index 00000000..3646d14f
--- /dev/null
+++ b/.env.example
@@ -0,0 +1 @@
+PORT=8000
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 00000000..4c49bd78
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.env
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 00000000..d1c34f62
--- /dev/null
+++ b/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"]
diff --git a/README.md b/README.md
index e376cc4d..98339df0 100644
--- a/README.md
+++ b/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/).
\ No newline at end of file
+Changes merged to `master` will be automatically deployed to [pennchime.herokuapp.com](https://pennchime.herokuapp.com/).
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 00000000..f90ac249
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,8 @@
+version: '3.1'
+
+services:
+  app:
+    build: .
+    restart: always
+    ports:
+      - "${PORT}:8000"