changelog: images update part2 (#210)

* changelog: Images update part 2

* docs: update .Net versions

Co-Authored-By: Julia March <[email protected]>

---------

Co-authored-by: Julia March <[email protected]>

content/changelog/2024-02-27-images-update-part2.md

@@ -0,0 +1,26 @@
+---
+title: February 2024 images update (part 2)
+date: 2024-02-27
+tags:
+  - images
+  - update
+authors:
+  - name: David Legrand
+    link: https://github.com/davlgd
+    image: https://github.com/davlgd.png?size=40
+description: New .Net version, Java Elastic/APM agent update
+excludeSearch: true
+---
+
+Earlier this month, we published [a first set of updates](/changelog/2024-02-02-images-update/) for Docker, Erlang, Go, Haskell, Ruby and Rust. Some days ago, we finished this work and all images are now up-to-date. This process occurred with no impact for our users. As mentioned in a previous post, this enables [the new `healthcheck` feature](/changelog/2024-02-26-healthcheck-for-everyone/) available for all applications. 
+
+New images include security patches, Linux kernel 6.7.1, OpenSSL 3.2.1 and Node.js 20.11.0 by default. For the latter, you can set it via the `CC_NODE_VERSION` [environment variable](/doc/reference/reference-environment-variables/#commons-to-all-applications). Other changes are as follows:
+
+* **.Net:**
+  * Version 8.0 support
+  * `CC_DOTNET_VERSION` [environment variable](/doc/reference/reference-environment-variables/#net) can be `6.0` or `8.0`
+* **Java - Elastic / APM:**
+  * The agent has been updated to 1.47.1
+  * Java 21 support
+
+New PHP image is next to come, with 8.3 version support, we're currently working on it. After that, we'll bring our new strategy to build images into production. We're currently testing it, and preparing enhancements for multiples runtimes. Your applications will automatically benefit from it when available. [Stay tuned](/changelog/index.xml).

content/doc/applications/dotnet/_index.md

@@ -36,7 +36,7 @@ You do not need to change a lot in your application, the *requirements* will hel
 
 ### .NET version
 
-The default version used on Clever Cloud is `6.0`. You can change it to `5.0` by setting the `CC_DOTNET_VERSION` environment variable to `5.0`. No support will be provided for end-of-life versions.
+The default version used on Clever Cloud is `8.0`. You can change it by setting the `CC_DOTNET_VERSION` environment variable to `6.0`. We don't support non-LTS and older versions.
 
 ### Requirements
 
@@ -50,10 +50,10 @@ Let's take an example with the [simple-feed-reader project](https://github.com/d
 
 First, you need to add the `APP_FOLDER=SimpleFeedReader` environment variable to define the application folder inside the Git repository.
 
-During deployment, the `SimpleFeedReader.csproj` file and the target framework `net5.0` are automatically detected. Then, the .NET project is published:
+During deployment, the runtime automatically detects the `SimpleFeedReader.csproj` file and the target framework `net8.0`. Then, it publishes the .NET project:
 
 ```bash
-dotnet publish --framework net5.0 --configuration Release
+dotnet publish --framework net8.0 --configuration Release
 ```
 
 No additional configuration is required (unless multiple project files or target frameworks are present, see the documentation below).
@@ -74,7 +74,7 @@ If your project file defines multiple targets, like :
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net5.0;net6.0</TargetFramework>
+    <TargetFramework>net6.0;net8.0</TargetFramework>
   </PropertyGroup>
   ...
 ```
@@ -84,7 +84,7 @@ You must specify the one you want to run, with the `CC_DOTNET_TFM` environment v
 If `CC_DOTNET_TFM` is specified, then the executable produced by this target is used to start the application.
 
 ```bash
-CC_DOTNET_TFM=net5.0
+CC_DOTNET_TFM=net6.0
 ```
 
 ### Dependencies
@@ -117,7 +117,7 @@ CC_DOTNET_PROFILE=Debug
 
 If you need to run a custom command (or just pass options to the program), you can specify it through the `CC_RUN_COMMAND` environment variable.
 
-For instance, you can have `CC_RUN_COMMAND=./bin/Release/net5.0/myapp <options>`.
+For instance, you can have `CC_RUN_COMMAND=./bin/Release/net6.0/myapp <options>`.
 
 ### Private dependencies
 

content/doc/reference/reference-environment-variables.md

@@ -140,7 +140,7 @@ If `TAILSCALE_LOGIN_SERVER` is provided, the agent will be configured to reach a
 |`CC_DOTNET_PROFILE` | Override the build configuration settings in your project. | Release |
 |`CC_DOTNET_PROJ` | The name of your project file to use for the build, without the .csproj / .fsproj / .vbproj extension. |  |
 |`CC_DOTNET_TFM` | Compiles for a specific framework. The framework must be defined in the project file. Example : `net5.0` |  |
-|`CC_DOTNET_VERSION` | Choose the .NET Core version between `5.0`,`6.0`. | 6.0 |
+|`CC_DOTNET_VERSION` | Choose the .NET Core version between `6.0`,`8.0`. | 8.0 |
 |`CC_RUN_COMMAND` | Custom command to run your application. |  |
 
 ## Elixir