Add basic devcontainer

.devcontainer/Dockerfile

@@ -0,0 +1,19 @@
+FROM ruby:3.3.0-slim-bullseye
+
+RUN apt-get update && export DEBIAN_FRONTEND=noninteractive \
+  && apt-get -y install --no-install-recommends \
+  apt-utils \
+  build-essential \
+  curl \
+  git \
+  imagemagick \
+  iproute2 \
+  libpq-dev \
+  openssh-client \
+  postgresql-client \
+  vim
+
+RUN gem install bundler
+RUN gem install foreman
+
+WORKDIR /workspace

.devcontainer/devcontainer.json

@@ -0,0 +1,14 @@
+{
+  "name": "Maybe",
+  "dockerComposeFile": "docker-compose.yml",
+  "service": "app",
+  "workspaceFolder": "/workspace",
+  "containerEnv": {
+    "GITHUB_TOKEN": "${localEnv:GITHUB_TOKEN}",
+    "GITHUB_USER": "${localEnv:GITHUB_USER}"
+  },
+  "remoteEnv": {
+    "PATH": "/workspace/bin:${containerEnv:PATH}"
+  },
+  "postCreateCommand": "bundle install"
+}

.devcontainer/docker-compose.yml

@@ -0,0 +1,45 @@
+version: "3"
+
+services:
+  app:
+    build:
+      context: ..
+      dockerfile: .devcontainer/Dockerfile
+
+    volumes:
+      - ..:/workspace:cached
+      - bundle_cache:/bundle
+
+    ports:
+      - "3000:3000"
+
+    command: sleep infinity
+
+    environment:
+      DB_HOST: db
+      HOST: "0.0.0.0"
+
+    depends_on:
+      - db
+      - redis
+
+  redis:
+    image: redis:latest
+    ports:
+      - "6379:6379"
+
+  db:
+    image: postgres:latest
+    restart: unless-stopped
+    volumes:
+      - postgres-data:/var/lib/postgresql/data
+    environment:
+      POSTGRES_USER: postgres
+      POSTGRES_DB: postgres
+      POSTGRES_PASSWORD: postgres
+    ports:
+      - "5432:5432"
+
+volumes:
+  postgres-data:
+  bundle_cache:

config/database.yml

@@ -18,6 +18,9 @@ default: &default
   # For details on connection pooling, see Rails configuration guide
   # https://guides.rubyonrails.org/configuring.html#database-pooling
   pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
+  host: <%= ENV.fetch("DB_HOST") { "127.0.0.1" } %>
+  password: postgres
+  user: postgres
 
 development:
   <<: *default