the specific compiler and runtime
(e.g. Java 11, Ruby 2.6, Python 3.7, NodeJS 12.9, …) 3. Install all required compile-time dependencies
(e.g. postgresql-dev, webkit-dev, openssl-dev, …) 4. Install the dependencies
(e.g. bundler, npm install, gradlew assemble, …) 5. Install all required runtime dependencies
(e.g. PostgreSQL 11, Redis 5, Elasticsearch 7.3, …) 6. Start the application and pray