Add licenses and fix manifests generation (#21)

Signed-off-by: Siyu Wang <FillZpp.pub@gmail.com>

.license/README.md

@@ -0,0 +1,19 @@
+# License Checker
+
+Our license checker CI rely on [LicenseFinder](https://github.com/pivotal/LicenseFinder).
+
+## How to add a new license
+
+LicenseFinder is a ruby project, so make sure you have ruby installed.
+
+### Install the tool
+
+```shell
+gem install license_finder
+```
+
+### Add a license
+
+```shell
+license_finder  permitted_licenses add MIT --decisions_file .license/dependency_decisions.yml
+```

.license/dependency_decisions.yml

@@ -0,0 +1,43 @@
+---
+- - :permit
+  - MIT
+  - :who: 
+    :why: 
+    :versions: []
+    :when: 2021-03-12 07:35:34.645031000 Z
+- - :permit
+  - Apache 2.0
+  - :who: 
+    :why: 
+    :versions: []
+    :when: 2021-03-12 07:19:18.243194000 Z
+- - :permit
+  - New BSD
+  - :who: 
+    :why: 
+    :versions: []
+    :when: 2021-03-12 07:19:28.540675000 Z
+- - :permit
+  - Simplified BSD
+  - :who: 
+    :why: 
+    :versions: []
+    :when: 2021-03-12 07:20:01.774212000 Z
+- - :permit
+  - Mozilla Public License 2.0
+  - :who: 
+    :why: 
+    :versions: []
+    :when: 2021-03-12 07:21:05.194536000 Z
+- - :permit
+  - unknown
+  - :who: 
+    :why: 
+    :versions: []
+    :when: 2021-03-12 07:21:43.379269000 Z
+- - :permit
+  - ISC
+  - :who: 
+    :why: 
+    :versions: []
+    :when: 2021-03-12 07:22:07.265966000 Z

Makefile

@@ -1,7 +1,6 @@
 
 # Image URL to use all building/pushing image targets
 IMG ?= controller:latest
-CRD_OPTIONS ?= "crd:crdVersions=v1"
 
 # Get the currently used golang install path (in GOPATH/bin, unless GOBIN is set)
 ifeq (,$(shell go env GOBIN))
@@ -37,7 +36,8 @@ help: ## Display this help.
 ##@ Development
 
 manifests: controller-gen ## Generate WebhookConfiguration, ClusterRole and CustomResourceDefinition objects.
-	$(CONTROLLER_GEN) $(CRD_OPTIONS) rbac:roleName=manager-role webhook paths="./..." output:crd:artifacts:config=config/crd/bases
+	$(CONTROLLER_GEN) crd:crdVersions=v1 paths="./api/..." output:crd:artifacts:config=config/crd/bases
+	$(CONTROLLER_GEN) rbac:roleName=manager-role webhook paths="./..."
 
 generate: controller-gen ## Generate code containing DeepCopy, DeepCopyInto, and DeepCopyObject method implementations.
 	$(CONTROLLER_GEN) object:headerFile="hack/boilerplate.go.txt" paths="./..."