Upgrade to Python 3.10 (#43)

The version that comes with Ubuntu 22.04.

.github/workflows/docker.yml

@@ -139,8 +139,8 @@ jobs:
             org.opencontainers.image.created=${{ fromJSON(steps.meta_k8s.outputs.json).labels['org.opencontainers.image.created'] }}
             org.opencontainers.image.revision=${{ fromJSON(steps.meta_k8s.outputs.json).labels['org.opencontainers.image.revision'] }}
 
-      - name: Build and push Docker image (devcontainer-python3.9)
+      - name: Build and push Docker image (devcontainer-python3.10)
         uses: devcontainers/[email protected]
         with:
-          subFolder: devcontainer-python3.9
-          imageName: ghcr.io/gantsign/devcontainer-python3.9
+          subFolder: devcontainer-python3.10
+          imageName: ghcr.io/gantsign/devcontainer-python3.10

README.adoc

@@ -369,7 +369,7 @@ FROM ghcr.io/gantsign/devcontainer-k8s
 Then press `Ctrl-P` and select "Remote-Containers: Open Folder in Container..."
 from the menu.
 
-== Python 3.9 container
+== Python 3.10 container
 
 Unlike the other containers this isn't based on the base container.
 
@@ -407,7 +407,7 @@ If you just want to try it out, you can run it standalone:
 
 [source,bash]
 ----
-docker run --rm -ti --user vscode --entrypoint zsh ghcr.io/gantsign/devcontainer-python3.9
+docker run --rm -ti --user vscode --entrypoint zsh ghcr.io/gantsign/devcontainer-python3.10
 ----
 
 === Running in VS Code
@@ -420,7 +420,7 @@ Create a `.devcontainer/devcontainer.json` file in the root of your project:
 // For format details, see https://aka.ms/devcontainer.json
 {
 	"name": "GantSign",
-	"image": "ghcr.io/gantsign/devcontainer-python3.9",
+	"image": "ghcr.io/gantsign/devcontainer-python3.10",
 
 	"settings": {
 		"editor.renderWhitespace": "all",

devcontainer-python3.9/.devcontainer/devcontainer.json → devcontainer-python3.10/.devcontainer/devcontainer.json

@@ -1,7 +1,7 @@
 // For format details, see https://aka.ms/devcontainer.json. For config options, see the
 // README at: https://github.com/devcontainers/templates/tree/main/src/python
 {
-	"image": "mcr.microsoft.com/devcontainers/python:0-3.9",
+	"image": "mcr.microsoft.com/devcontainers/python:0-3.10",
 	"features": {
 		"ghcr.io/devcontainers/features/common-utils:2": {
 			"installZsh": true,