docker conversion to postgresql

Dockerfile

@@ -1,7 +1,7 @@
 FROM phusion/passenger-ruby22:latest
 
 RUN apt-get update \
-  && apt-get upgrade -y \
+  && apt-get upgrade -y --force-yes \
   && apt-get install -y ruby2.3 ruby2.3-dev \
   && ruby-switch --set ruby2.3
 

Gemfile

@@ -2,7 +2,6 @@ source 'https://rubygems.org'
 
 gem 'rails', '5.0.0'
 gem 'sqlite3'
-gem 'mysql2', '~> 0.3.18'
 gem 'pg', '~> 0.18.4'
 gem 'sass-rails', '~> 5.0'
 gem 'uglifier', '>= 1.3.0'

Gemfile.lock

@@ -107,7 +107,6 @@ GEM
     mini_portile2 (2.1.0)
     minitest (5.9.0)
     multi_json (1.12.1)
-    mysql2 (0.3.21)
     nenv (0.3.0)
     nio4r (1.2.1)
     nokogiri (1.6.8)
@@ -236,7 +235,6 @@ DEPENDENCIES
   guard-rspec
   jbuilder (~> 2.5)
   jquery-rails (~> 4.1.1)
-  mysql2 (~> 0.3.18)
   pg (~> 0.18.4)
   rails (= 5.0.0)
   rspec-rails (~> 3.5.0)
@@ -249,4 +247,4 @@ DEPENDENCIES
   web-console (~> 3.3.1)
 
 BUNDLED WITH
-   1.11.2
+   1.12.5

config/database.yml

@@ -21,12 +21,12 @@ test:
   database: db/test.sqlite3
   
 docker:
-  adapter: mysql2
+  adapter: postgresql
   pool: 5
   timeout: 5000
-  host: mysql
+  host: postgres
   username: parsley
-  password: password
+  password: mysecretpassword
   database: parsley
 
 production:

docker-compose.yml

@@ -1,17 +1,19 @@
-mysql:
+version: '2'
-  image: mysql:5.6
+
+services:
+  postgres:
+    image: postgres:9.3
     environment:
-    - MYSQL_ROOT_PASSWORD=mysupersecret
+      - POSTGRES_PASSWORD=mysecretpassword
-    - MYSQL_DATABASE=parsley
+      - POSTGRES_USER=parsley
-    - MYSQL_USER=parsley
+    volumes:
-    - MYSQL_PASSWORD=password
+      - sql-data:/var/lib/postgresql/data
-  volumes_from:
-    - parsley_db_data
-
-
   web:
     build: .
     ports:
       - "3000:80"
     links:
-    - mysql
+      - postgres
+volumes:
+  sql-data:
+    driver: local