add Docker for local development

.dockerignore

@@ -0,0 +1,16 @@
+node_modules
+npm-debug.log
+Dockerfile*
+docker-compose*
+.dockerignore
+.git
+.gitignore
+README.md
+LICENSE
+.vscode
+public
+.cache
+.travis.yml
+package-lock.json
+README.md
+coverage

.travis.yml

@@ -1,7 +1,6 @@
 dist: xenial
 language: node_js
-node_js:
-  - '12'
+node_js: node
 
 git:
   depth: 10

Dockerfile

@@ -0,0 +1,25 @@
+# Dockerfile for local development just installing dependencies.
+# Use together with `docker-compose up`
+FROM node:alpine
+
+RUN mkdir -p /blog
+WORKDIR /blog
+COPY package.json .
+
+RUN apk add --no-cache --virtual .build-deps \
+    g++ \
+    make \
+    autoconf \
+    automake \
+    libtool \
+    nasm \
+    libc6-compat \
+    libjpeg-turbo-dev \
+    libpng-dev \
+    git \
+    bash \
+    python \
+    && rm -rf /var/cache/apk/* \
+    && npm install \
+    && npm cache clean --force \
+    && apk del .build-deps

README.md

@@ -163,20 +163,21 @@ If you want to know how this works, have a look at the respective component unde
 
 ## ✨ Development
 
-You need to have the following tools installed on your development machine before moving on:
-
-- [Node.js](http://nodejs.org/)
-- [npm](https://npmjs.org/)
-
-Then install dependencies and start everything up:
+You can simply use [Docker](https://www.docker.com) & [Docker Compose](https://docs.docker.com/compose/) or install and run dependencies on your local system.
 
 ```bash
-npm i
+git clone git@github.com:kremalicious/blog.git
+cd blog/
 
 # GITHUB_TOKEN is required for some parts
 cp .env.sample .env
 vi .env
 
+# use Docker
+docker-compose up
+
+# or go with local system
+npm i
 npm start
 ```
 

docker-compose.yml

@@ -0,0 +1,10 @@
+version: '3'
+services:
+  blog:
+    build: .
+    command: npm run start:docker
+    volumes:
+      - .:/blog
+      - /blog/node_modules
+    ports:
+      - '8000:8000'

package.json

@@ -8,6 +8,7 @@
   "main": "index.js",
   "scripts": {
     "start": "gatsby develop",
+    "start:docker": "gatsby develop --host 0.0.0.0",
     "build": "gatsby build && npm run copy",
     "ssr": "npm run build && serve -s public/",
     "test": "npm run lint && jest --coverage",