docker maintenance

 - added docker-compose.yml for quick one-command spinup
 - added docker-compose.dev.yml to override /habitrpg mount
 - modified Dockerfile to accept /habitrpg mount

Dockerfile

@@ -28,11 +28,13 @@ RUN npm install -g gulp grunt-cli bower
 # Clone Habitica repo and install dependencies
 WORKDIR /habitrpg
 RUN git clone https://github.com/HabitRPG/habitrpg.git /habitrpg
+#RUN test -e /habitrpg || git clone https://github.com/HabitRPG/habitrpg.git /habitrpg
 RUN npm install
 RUN bower install --allow-root
 
 # Create environment config file and build directory
 RUN cp config.json.example config.json
+#RUN test -e config.json || cp config.json.example config.json
 RUN mkdir -p ./website/build
 
 # Start Habitica

docker-compose.dev.yml

@@ -0,0 +1,3 @@
+web:
+  volumes:
+  - '.:/habitrpg'

docker-compose.yml

@@ -0,0 +1,13 @@
+web:
+  build: .
+  ports:
+   - "3000:3000"
+  links:
+  - mongo
+  environment:
+  - NODE_DB_URI=mongodb://mongo/habitrpg
+
+mongo:
+  image: mongo
+  ports:
+   - "27017:27017"