Update docker compose (jakearchibald#24)

* Update docker-compose.yml to run using a volume

* Add package-lock.json

* Update package-lock.json

* Add start script to package.json
It runs npm install if node_modules folder doesn't exist then runs the serve script

* Add a newline at the end of docker-compose.yml file

* Update README.md

* Add start.sh script and use it in docker-compose.yml

* Add newline at the end of start.sh script

* Small update in README.md

* Update container_name in docker-compose.yml

* Update package-lock.json to fix `npm ERR! code EINTEGRITY`

* Update docker-compose.yml command to use start.sh script

* Remove start script from package.json

* Rename service name in docker-compose from witter to wittr

* Remove package-lock.json

* Remove start.sh, update the command in docker-compose.yml and update README.md

* Update README.md, moving the running on local machine section on top

* Minor grammar changes

README.md

@@ -2,7 +2,11 @@
 
 This is a silly little demo app for an offline-first course.
 
-# Installing
+You could run the app either using machine dependnecies, or using docker
+
+## Running using local machine
+
+### Installing
 
 Dependencies:
 
@@ -14,12 +18,14 @@ Then check out the project and run:
 npm install
 ```
 
-# Running
+### Running
 
 ```sh
 npm run serve
 ```
 
+### Using the app
+
 You should now have the app server at [localhost:8888](http://localhost:8888) and the config server at [localhost:8889](http://localhost:8889).
 
 You can also configure the ports:
@@ -28,9 +34,27 @@ You can also configure the ports:
 npm run serve -- --server-port=8000 --config-server-port=8001
 ```
 
-# Troubleshooting
+## Running using docker
+
+```sh
+docker-compose up
+```
+
+Here also you should have the app server at [localhost:8888](http://localhost:8888) and the config server at [localhost:8889](http://localhost:8889).
+
+You can configure the ports by changing them in `docker-compose.yml` before starting:
+
+```yml
+ports:
+  # <host>:<container>
+  - 8000:8888
+  - 8001:8889
+```
+
+## Troubleshooting
 
-- Errors while executing `npm run serve`
-  - The first thing to try is to upgrade to latest version of node
-  - If latest version also produces errors, try installing v4.5.0
-    - An easy for that would be to use `nvm` as discussed [here](http://stackoverflow.com/a/7718438/1585523)
+* Errors while executing `npm run serve`.
+  * The first thing to try is to upgrade to latest version of node.
+  * If latest version also produces errors, try installing v4.5.0.
+    * An easy fix for that would be [to use `nvm`](http://stackoverflow.com/a/7718438/1585523).
+* If you get any node-sass errors, try running `npm rebuild node-sass --force` or the remove `node_modules` folder and run `npm install` again

docker-compose.yml

@@ -1,5 +1,19 @@
-witter:
-    build: .
-    ports:
-        - 8888:8888
-        - 8889:8889
+version: '2.1'
+
+services:
+    wittr:
+        image: node:latest
+        container_name: c-wittr
+        command: /bin/bash -c "if [ ! -d node_modules ] ; then npm install ; fi && npm run serve"
+        working_dir: /usr/src/app
+        volumes:
+            - .:/usr/src/app
+        ports:
+            - 8888:8888
+            - 8889:8889
+        healthcheck:
+            test: "wget -q -O - http://localhost:8888"
+            interval: 1s
+            timeout: 30s
+            retries: 300
+        restart: unless-stopped