Update Dockerfile, docker-compose.yml and add .dockerignore so builds…

… are now self-contained, update README.md

.dockerignore

@@ -0,0 +1,5 @@
+node_modules/
+dist/
+.git/
+.gitignore
+README.md

Dockerfile

@@ -1,14 +1,27 @@
-FROM node:6
+# Use the slim version of the latest Node LTS which includes Yarn
+FROM node:6.10.2-slim
 
-RUN apt-get update
-RUN apt-get install apt-transport-https
+# Docker images have no default editor so we'll use vim
+RUN apt-get update && apt-get install -y \
+  vim
 
-RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
-RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
-
-RUN apt-get update
-RUN apt-get install yarn
+# Create an app directory for our app to exist in the docker container
+RUN mkdir -p app
 
+# Establish a directory where later commands will be run relative to in the container
 WORKDIR /app
 
+# Copy package.json & yarn.lock into our app directory in the container
+COPY package.json \
+  yarn.lock \
+  # Destination folder
+  /app/
+
+# Install dependencies in the container
+RUN yarn install
+
+# Copy all the rest of our files into the app directory in the container
+COPY . /app
+
+# Expose port for webpack
 EXPOSE 8080

README.md

@@ -33,14 +33,16 @@ git push origin master
 
 ## Commands
 
-Run your tests with:
-```
-yarn test
-```
 Run the server with:
 ```
 yarn start
 ```
+
+Run your tests with:
+```
+yarn test
+```
+
 Run a build with:
 ```
 yarn build
@@ -50,7 +52,7 @@ yarn build
 
 Build and start the server:
 ```
-docker-compose up
+docker-compose up --build
 ```
 
 Run your tests with:
@@ -62,3 +64,8 @@ Run a build with:
 ```
 docker-compose exec web yarn build
 ```
+
+If your terminal closes run:
+```
+docker-compose logs --follow
+```

docker-compose.yml

@@ -4,8 +4,8 @@ services:
   web:
     tty: true
     build: .
-    command: bash -c "yarn && yarn start"
+    command: 'yarn start'
     ports:
-      - '8080:8080'
+      - "8080:8080"
     volumes:
-      - .:/app:rw
+      - .:/app