Add documentation for making HTTPS requests

Documents the configuration for CA certificates implemented in spinkube#207

Signed-off-by: Adam Reese <adam@reese.io>

content/en/docs/topics/https-requests.md

@@ -0,0 +1,64 @@
+---
+title: Making HTTPS Requests
+description: Configure Spin Apps to allow HTTPS requests.
+date: 2024-09-03
+categories: [Spin Operator]
+tags: [Tutorials]
+weight: 11
+aliases:
+- /docs/spin-operator/tutorials/https-requests
+---
+
+To enable HTTPS requests, the [executor](https://www.spinkube.dev/docs/glossary/#spin-app-executor-crd) must be configured to use certificates. SpinKube can be configured to use either default or custom certificates.
+
+If you make a request without properly configured certificates, you'll encounter an error message that reads: `error trying to connect: unexpected EOF (unable to get local issuer certificate)`.
+
+## Using default certificates
+
+SpinKube can generate a default CA certificate bundle by setting `installDefaultCACerts` to `true`. This creates a secret named `spin-ca` populated with curl's [default bundle](https://curl.se/ca/cacert.pem). You can specify a custom secret name by setting `caCertSecret`.
+
+```yaml
+apiVersion: core.spinoperator.dev/v1alpha1
+kind: SpinAppExecutor
+metadata:
+ name: containerd-shim-spin
+spec:
+ createDeployment: true
+ deploymentConfig:
+ runtimeClassName: wasmtime-spin-v2
+ installDefaultCACerts: true
+```
+
+Apply the executor using kubectl:
+
+```console
+kubectl apply -f myexecutor.yaml
+```
+
+## Using custom certificates
+
+Create a secret from your certificate file:
+
+```console
+kubectl create secret generic my-custom-ca --from-file=ca-certificates.crt
+```
+
+Configure the executor to use the custom certificate secret:
+
+```yaml
+apiVersion: core.spinoperator.dev/v1alpha1
+kind: SpinAppExecutor
+metadata:
+ name: containerd-shim-spin
+spec:
+ createDeployment: true
+ deploymentConfig:
+ runtimeClassName: wasmtime-spin-v2
+ caCertSecret: my-custom-ca
+```
+
+Apply the executor using kubectl:
+
+```console
+kubectl apply -f myexecutor.yaml
+```