Add README's to the templates

templates/rust/events/README.md

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+# Rust HTTP Function
+
+Welcome to your new Rust function project! The boilerplate
+[actix](https://actix.rs/) app can be found in
+[`src/main.rs`](./src/main.rs). The `handle` function will respond to
+POST requests containing a `CloudEvent`.
+
+The app will expose three endpoints:
+
+  * `/` Triggers the `handle` function for a POST method
+  * `/health/readiness` The endpoint for a readiness health check
+  * `/health/liveness` The endpoint for a liveness health check
+
+You may use any of the available [actix
+features](https://actix.rs/docs/) to fulfill the requests at those
+endpoints.
+
+## Development
+
+This is a fully self-contained application, so you can develop it as
+you would any other Rust application, e.g.
+
+```shell script
+cargo build
+cargo test
+cargo run
+```
+
+Once running, the function is available at <http://localhost:8080> and
+the health checks are at <http://localhost:8080/health/readiness> and
+<http://localhost:8080/health/liveness>. To POST an event to the
+function, a utility such as `curl` may be used:
+
+```console
+curl -X POST -d '{"name": "bootsy"}' \
+  -H'Content-type: application/json' \
+  -H'ce-specversion: 1.0' \
+  -H'ce-id: 1' \
+  -H'ce-source: http://cloudevents.io' \
+  -H'ce-type: dev.knative.example' \
+  http://localhost:8080
+```
+
+## Deployment
+
+Use `func` to containerize your application, publish it to a registry
+and deploy it as a Knative Service in your Kubernetes cluster:
+
+```shell script
+func deploy --registry=docker.io/<YOUR_ACCOUNT>
+```
+
+You can omit the `--registry` option by setting the `FUNC_REGISTRY`
+environment variable. And if you forget, you'll be prompted.
+
+Have fun!

templates/rust/http/README.md

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+# Rust HTTP Function
+
+Welcome to your new Rust function project! The boilerplate
+[actix](https://actix.rs/) app can be found in
+[`src/main.rs`](./src/main.rs). The `index` function will respond to
+both GET and POST requests as configured in the `main` function.
+
+The app will expose three endpoints:
+
+  * `/` Triggers the `index` function, for either GET or POST methods
+  * `/health/readiness` The endpoint for a readiness health check
+  * `/health/liveness` The endpoint for a liveness health check
+
+You may use any of the available [actix
+features](https://actix.rs/docs/) to fulfill the requests at those
+endpoints.
+
+## Development
+
+This is a fully self-contained application, so you can develop it as
+you would any other Rust application, e.g.
+
+```shell script
+cargo build
+cargo test
+cargo run
+```
+
+Once running, the function is available at <http://localhost:8080> and
+the health checks are at <http://localhost:8080/health/readiness> and
+<http://localhost:8080/health/liveness>. To POST data to the function,
+a utility such as `curl` may be used:
+
+```console
+curl -X POST -d '{"hello": "world"}' \
+  -H'Content-type: application/json' \
+  http://localhost:8080
+```
+
+## Deployment
+
+Use `func` to containerize your application, publish it to a registry
+and deploy it as a Knative Service in your Kubernetes cluster:
+
+```shell script
+func deploy --registry=docker.io/<YOUR_ACCOUNT>
+```
+
+You can omit the `--registry` option by setting the `FUNC_REGISTRY`
+environment variable. And if you forget, you'll be prompted.
+
+Have fun!