docs(deployment): Add details of deploying STAC Auth Proxy

Author: alukach

docs/user-guide/deployment.md

@@ -0,0 +1,107 @@
+# Deployment
+
+## General
+
+Deploying the STAC Auth Proxy is similar to deploying any other service. In general, we recommend you mirror the architecture of your other systems.
+
+The core principles of deploying the STAC Auth Proxy are:
+
+1. The STAC API should not be available on the public internet
+2. The STAC Auth Proxy should be able to communicate with both the STAC API and the OIDC Server (namely, the discovery endpoint and JWKS endpoint)
+
+### Networking Considerations
+
+#### Hiding the STAC API
+
+The STAC API should not be directly accessible from the public internet. The STAC Auth Proxy acts as the public-facing endpoint.
+
+##### AWS Strategy
+
+- Place the STAC API in a private subnet
+- Place the STAC Auth Proxy in a public subnet with internet access
+- Use security groups to restrict access between components
+
+##### Kubernetes Strategy
+
+- Deploy the STAC API as an internal service (ClusterIP)
+- Deploy the STAC Auth Proxy with an Ingress for external access
+- Use network policies to control traffic flow
+
+#### Communicating with the OIDC Server
+
+The STAC Auth Proxy needs to communicate with your OIDC provider for authentication. If your OIDC server is not directly available to the STAC Auth Proxy, use [`OIDC_DISCOVERY_INTERNAL_URL`](configuration.md#oidc_discovery_internal_url) (the [`OIDC_DISCOVERY_URL`](configuration.md#oidc_discovery_url) will still be used for auth in the browser, such as the Swagger UI page).
+
+## AWS Lambda
+
+For AWS Lambda deployments, we recommend using the [Mangum](https://pypi.org/project/mangum/) handler with disabled lifespan events. Such a handler is available at `stac_auth_proxy.lambda:handler`.
+
+> [!TIP]
+>
+> If using `stac_auth_proxy.lambda:handler`, be sure to install the `lambda` optional dependencies:
+>
+> ```bash
+> pip install stac_auth_proxy[lambda]
+> ```
+
+### CDK
+
+If using [AWS CDK](https://docs.aws.amazon.com/cdk/), a [`StacAuthProxy` Construct](https://developmentseed.org/eoapi-cdk/#stacauthproxylambda-) is made available within the [`eoapi-cdk`](https://github.com/developmentseed/eoapi-cdk) project.
+
+## Docker
+
+The STAC Auth Proxy is available as a Docker image from the [GitHub Container Registry (GHCR)](https://github.com/developmentseed/stac-auth-proxy/pkgs/container/stac-auth-proxy).
+
+```bash
+# Latest version
+docker pull ghcr.io/developmentseed/stac-auth-proxy:latest
+
+# Specific version
+docker pull ghcr.io/developmentseed/stac-auth-proxy:v0.7.1
+```
+
+## Kubernetes
+
+The STAC Auth Proxy can be deployed to Kubernetes using our [published Helm chart](https://github.com/developmentseed/stac-auth-proxy/pkgs/container/stac-auth-proxy%2Fcharts%2Fstac-auth-proxy).
+
+### Prerequisites
+
+- Kubernetes 1.19+
+- Helm 3.2.0+
+
+### Installation
+
+```bash
+# Add the Helm repository
+helm registry login ghcr.io
+
+# Install with minimal configuration
+helm install stac-auth-proxy oci://ghcr.io/developmentseed/stac-auth-proxy/charts/stac-auth-proxy \
+  --set env.UPSTREAM_URL=https://your-stac-api.com/stac \
+  --set env.OIDC_DISCOVERY_URL=https://your-auth-server/.well-known/openid-configuration \
+  --set ingress.host=stac-proxy.your-domain.com
+```
+
+### Configuration
+
+| Parameter                | Description                                   | Required | Default |
+| ------------------------ | --------------------------------------------- | -------- | ------- |
+| `env.UPSTREAM_URL`       | URL of the STAC API to proxy                  | Yes      | -       |
+| `env.OIDC_DISCOVERY_URL` | OpenID Connect discovery document URL         | Yes      | -       |
+| `env`                    | Environment variables passed to the container | No       | `{}`    |
+| `ingress.enabled`        | Enable ingress                                | No       | `true`  |
+| `ingress.className`      | Ingress class name                            | No       | `nginx` |
+| `ingress.host`           | Hostname for the ingress                      | No       | `""`    |
+| `ingress.tls.enabled`    | Enable TLS for ingress                        | No       | `true`  |
+| `replicaCount`           | Number of replicas                            | No       | `1`     |
+
+For a complete list of values, see the [values.yaml](./helm/values.yaml) file.
+
+### Management
+
+```bash
+# Upgrade
+helm upgrade stac-auth-proxy oci://ghcr.io/developmentseed/stac-auth-proxy/charts/stac-auth-proxy
+
+# Uninstall
+helm uninstall stac-auth-proxy
+```

helm/README.md

@@ -34,6 +34,7 @@ nav:
       - Configuration: user-guide/configuration.md
       - Route-Level Auth: user-guide/route-level-auth.md
       - Record-Level Auth: user-guide/record-level-auth.md
+      - Deployment: user-guide/deployment.md
       - Tips: user-guide/tips.md
   - Architecture:
       - Middleware Stack: architecture/middleware-stack.md