feat(docker): Added basic development image for docker.

docker-compose.yml

@@ -0,0 +1,13 @@
+version: '3'
+services:
+  serpico:
+    environment:
+      - SRP_ADMIN=administrator
+      - SRP_FINDINGS=yes
+    build:
+      dockerfile: docker/dev.dockerfile
+      context: .
+    ports:
+      - "8443:8443"
+    volumes:
+      - ./:/Serpico

docker/dev.dockerfile

@@ -0,0 +1,9 @@
+FROM ruby:2.3.5
+MAINTAINER Serpico
+ENV SRP_ROOT /Serpico
+WORKDIR $SRP_ROOT
+# No volume: It will be mounted by docker-compose.
+COPY Gemfile $SRP_ROOT/
+RUN bundle install
+EXPOSE 8443
+CMD ["bash", "docker/docker.sh"]

docker/docker.sh

@@ -0,0 +1,12 @@
+#!/usr/bin/bash
+# This script is used as the entry point for the docker image.
+# It will initialize the database if it isn't already present.
+
+if [ ! -f "$SRP_ROOT/db/master.db" ]; then
+    echo "First run detected. Initializing database..."
+    ruby "$SRP_ROOT/scripts/first_time.rb"
+fi
+
+# CMD ["ruby", "serpico.rb"]
+ruby serpico.rb
+

docs/docker.md

@@ -44,6 +44,14 @@ path to the database on the host [must be absolute][1].
 
 [1]: https://docs.docker.com/engine/reference/run/#volume-shared-filesystems
 
+## docker-compose
+
+The `docker-compose.yml` in the repository is aimed at development use. It will
+provision the ruby environment inside the container and mount the repository as
+the docker application, allowing for reloading the source code by simply
+restarting the container. The dockerfile `docker/dev.dockerfile` is used by
+compose.
+
 ## Caveats
 
 This is a work in progress, so a few things are currently not supported.
@@ -52,4 +60,6 @@ This is a work in progress, so a few things are currently not supported.
   `first_time.rb` will not run, and there won't be any certificates for SSL.
 - `config.json` is not exposed to the host so customization requires rebuilding
   the image or accessing it with `docker exec bash`.
+- `docker-compose up` will not automatically reload the backend when `.rb`
+  files are changed. This is a possible improvement.