Update dev docs

DEVELOPMENT.md

@@ -6,19 +6,32 @@
 
 ## Installing required dependencies
 
-The dependency [libgit2](https://libgit2.org/) needs to be installed to be able
-to run source-controller or its test-suite locally (not in a container).
+There are a number of dependencies required to be able to run the controller and its test suite locally:
+
+- [Install Go](https://golang.org/doc/install)
+- [Install Kustomize](https://kubernetes-sigs.github.io/kustomize/installation/)
+- [Install Docker](https://docs.docker.com/engine/install/)
+- (Optional) [Install Kubebuilder](https://book.kubebuilder.io/quick-start.html#installation)
+
+The dependency [libgit2](https://libgit2.org/) also needs to be installed to be able
+to run `source-controller` or its test-suite locally (not in a container).
 
 In case this dependency is not present on your system (at the expected
 version), the first invocation of a `make` target that requires the
 dependency will attempt to compile it locally to `hack/libgit2`. For this build
-to succeed; CMake, Docker, OpenSSL 1.1 and LibSSH2 must be present on the system.
+to succeed ensure the following dependencies are present on your system:
+- [CMake](https://cmake.org/download/)
+- [OpenSSL 1.1](https://www.openssl.org/source/)
+- [LibSSH2](https://www.libssh2.org/)
+- [pkg-config](https://freedesktop.org/wiki/Software/pkg-config/)
 
 Triggering a manual build of the dependency is possible as well by running
 `make libgit2`. To enforce the build, for example if your system dependencies
 match but are not linked in a compatible way, append `LIBGIT2_FORCE=1` to the
 `make` command.
 
+Follow the instructions below to install these dependencies to your system.
+
 ### macOS
 
 ```console
@@ -39,32 +52,31 @@ $ LIBGIT2_FORCE=1 make libgit2
 followed using any other package manager. Some distributions may have slight 
 variation of package names (e.g. `apt install -y cmake openssl libssh2-1-dev`).
 
-## How to run the test suite
-
-The test suite depends on [envtest] being installed. For minimum required 
-version refer to the variable `ENVTEST_BIN_VERSION` in the [Makefile](./Makefile).
+In addition to the above, the following dependencies are also used by some of the `make` targets:
 
-You can run the unit tests by simply doing:
+- `controller-gen` (v0.7.0)
+- `gen-crd-api-reference-docs` (v0.3.0)
+- `setup-envtest` (latest)
 
-```bash
-make test
-```
-
-[envtest]: https://book.kubebuilder.io/reference/envtest.html#installation
+If any of the above dependencies are not present on your system, the first invocation of a `make` target that requires them will install them.
 
+## How to run the test suite
 
-## How to run the controller locally
+Prerequisites:
+* Go >= 1.17
 
-Install flux on your test cluster:
+You can run the test suite by simply doing
 
 ```sh
-flux install
+make test
 ```
 
-Scale the in-cluster controller to zero:
+## How to run the controller locally
+
+Install the controller's CRDs on your test cluster:
 
 ```sh
-kubectl -n flux-system scale deployment/source-controller --replicas=0
+make install
 ```
 
 Run the controller locally:
@@ -115,11 +127,22 @@ IMG=registry-path/source-controller TAG=latest BUILD_ARGS=--push BUILD_PLATFORMS
 
 [buildx build options]: https://docs.docker.com/engine/reference/commandline/buildx_build/#options
 
+If you get the following error when building the docker container:
+```
+Multiple platforms feature is currently not supported for docker driver.
+Please switch to a different driver (eg. "docker buildx create --use")
+```
+
+you may need to create and switch to a new builder that supports multiple platforms:
+
+```sh
+docker buildx create --use
+```
 
 ### Deploying into a cluster
 
 Deploy `source-controller` into the cluster that is configured in the local kubeconfig file (i.e. `~/.kube/config`):
 
 ```sh
-make dev-deploy
+make deploy
 ```