Type
Contents:
The type key defines the base container image that will be used to run the application. There is a separate base container image for each primary language for the application, often in multiple versions.
Supported types 
Available languages and their supported versions include:
| Language | runtime |
Supported version |
|---|---|---|
| C#/.Net Core | dotnet |
2.0, 2.1, 2.2, 3.1 |
| Elixir | elixir |
1.9 |
| Go | golang |
1.11, 1.12, 1.13, 1.14, 1.15 |
| Java | java |
11, 12, 8, 13 |
| Lisp | lisp |
1.5 |
| Node.js | nodejs |
6, 8, 10, 12, 14 |
| PHP | php |
7.2, 7.3, 7.4 |
| Python | python |
2.7, 3.5, 3.6, 3.7, 3.8 |
| Ruby | ruby |
2.3, 2.4, 2.5, 2.6, 2.7 |
Example configuration
type: 'php:7.4'Runtime
The .platform.app.yaml file also supports a runtime key that allows selected customizations to the language runtime. As those possibilities vary by language, please see the appropriate language documentation.