Add docker files so that anyone with docker can spin up hackfoldr

Author: MrOrz

Dockerfile

@@ -0,0 +1,13 @@
+# Dockerfile for development on local machine.
+#
+
+FROM starefossen/ruby-node:2-6
+
+WORKDIR /srv
+
+RUN gem install compass --no-document && \
+    gem install tilt --version "1.4.1" --no-document
+
+ADD package.json ./
+RUN npm i
+CMD ["npm", "start"]

README.md

@@ -4,3 +4,19 @@ Please go to this [cleaner new repo](https://github.com/hackfoldr/hackfoldr-2.0-
 
 ## Why?
 We wiped-out all accidentally commited project specific files in the new repo, and decided to keep this repo for those projects.
+
+## Development
+
+To run hackfoldr on local machine, please install `docker` & `docker-compose` first, then run:
+
+```
+$ docker-compose up
+```
+
+This will spin up http://localhost:3000 using the latest code in the current directory.
+
+If you update package.json, you will need to rebuild the base image using:
+
+```
+$ docker-compose up --build
+```

docker-compose.yml

@@ -0,0 +1,18 @@
+version: '2'
+
+volumes:
+  # node_modules in hackfoldr service goes to this named volume
+  # so that local machine's node_modules are not messed up
+  # https://stackoverflow.com/a/38601156
+  node_modules:
+
+services:
+  hackfoldr:
+    build:
+      context: .
+    volumes:
+      - .:/srv
+      # node_modules will use named volume instead of the one under current directory
+      - node_modules:/srv/node_modules
+    ports:
+      - 3000:3000