update docker to ruby 3.0

Dockerfile

@@ -1,4 +1,4 @@
-FROM ruby:2.6.0
+FROM ruby:3.0.0
 
 RUN mkdir /app
 WORKDIR /app

Gemfile.lock

@@ -107,6 +107,8 @@ GEM
  nio4r (2.5.8)
  nokogiri (1.12.5-x86_64-darwin)
  racc (~> 1.4)
+ nokogiri (1.12.5-x86_64-linux)
+ racc (~> 1.4)
  parallel (1.21.0)
  parser (3.0.2.0)
  ast (~> 2.4.1)
@@ -224,6 +226,7 @@ GEM
 
 PLATFORMS
  x86_64-darwin-19
+ x86_64-linux
 
 DEPENDENCIES
  bootsnap (>= 1.4.2)
@@ -252,4 +255,4 @@ RUBY VERSION
  ruby 3.0.0p0
 
 BUNDLED WITH
- 2.2.30
+ 2.2.3

docker-compose.yml

@@ -4,6 +4,8 @@ services:
  image: postgres
  ports:
  - 5434:5432
+ environment:
+ POSTGRES_PASSWORD: password
  web:
  image: nginx
  volumes:
@@ -21,6 +23,6 @@ services:
  ports:
  - 3000:3000
  environment:
- - DATABASE_URL=postgres://postgres@db
+ - DATABASE_URL=postgres://postgres:password@db
  links:
  - db