Add docker-compose build steps

docker-compose is a quick way to spin up this project.

README.md

@@ -29,6 +29,16 @@ Point your browser on http://192.168.44.55 (or use `/etc/hosts` entry explain.de
 1. Open `explain.pp` and fix line 5 with correct project dir value
 1. Call `sudo puppet apply --logdest console explain.pp` on your working copy directory.
 
+## Docker Compose setup
+
+*NOTE* This setup should be considered for quick analysis purposes only - while docker-compose
+does keep DBs around from run to run, don't rely on it to store your history long term.
+
+```
+cd docker
+docker-compose up --build
+```
+
 ## Manual setup
 
 ### 1) Mojolicious

docker/Dockerfile

@@ -0,0 +1,29 @@
+FROM debian:stretch
+
+WORKDIR /explain
+
+RUN curl -L cpanmin.us | perl - -n Mojolicious
+ENV DEBIAN_FRONTEND=noninteractive
+RUN apt-get update && \
+    apt-get install -y libmojolicious-perl \
+                libemail-sender-perl \
+                libdate-simple-perl \
+                libemail-valid-perl \
+                libxml-simple-perl  \
+                libdbd-pg-perl \
+                libmodule-build-perl \
+                libyaml-perl \
+                libjson-perl \
+                libclone-perl \
+                libtest-deep-perl \
+                libtest-exception-perl
+
+RUN cpan install Pg::Explain
+COPY lib/ ./lib/
+RUN sed -i s/Mail::Sender/Email::Sender/g lib/Explain/Plugin/MailSender.pm
+COPY docker/explain.json explain.pl ./
+COPY layout/ /layout/
+COPY public/ ./public/
+COPY templates/ ./templates
+
+ENTRYPOINT ./explain.pl daemon

docker/docker-compose.yml

@@ -0,0 +1,18 @@
+version: '3'
+services:
+  web:
+    build:
+      context: ..
+      dockerfile: docker/Dockerfile
+    ports:
+     - "3000:3000"
+    depends_on:
+      - "db"
+  db:
+    image: "postgres:10.7"
+    environment:
+      POSTGRES_USER: explaind
+      POSTGRES_PASSWORD: explain
+      POSTGRES_DB: explain
+    volumes:
+      - ../sql:/docker-entrypoint-initdb.d

docker/explain.json

@@ -0,0 +1,17 @@
+{
+    "title" : "explain.localhost",
+
+    "secret" : "probablynotimportantforephemeral",
+
+    "database" : {
+        "dsn"      : "dbi:Pg:database=explain;host=db;port=5432",
+        "username" : "explaind",
+        "password" : "explain",
+        "options"  : {
+            "auto_commit" : 1,
+            "pg_server_prepare" : 0,
+            "RaiseError" : 1,
+            "PrintError" : 1
+        }
+    }
+}