Set public Tekton Hub API as default catalog

Public tekton hub API was not set by default in the hub resolver, i
understand that ArtifactHUB is the future but until then
makes it more easier to use the tekton hub

Signed-off-by: Chmouel Boudjnah <[email protected]>

Author: chmouel

config/resolvers/resolvers-deployment.yaml

@@ -102,6 +102,8 @@ spec:
       # Override this env var to set a private hub api endpoint
         - name: ARTIFACT_HUB_API
           value: "https://artifacthub.io/"
+        - name: TEKTON_HUB_API
+          value: "https://api.hub.tekton.dev/"
         securityContext:
           allowPrivilegeEscalation: false
           readOnlyRootFilesystem: true

docs/hub-resolver.md

@@ -64,7 +64,10 @@ env
   value: "https://artifacthub.io/"
 ```
 
-When setting the `type` field to `tekton`, you **must** configure your own instance of the Tekton Hub by setting the `TEKTON_HUB_API` environment variable in
+When setting the `type` field to `tekton`, the resolver will hit the public
+tekton catalog api at https://api.hub.tekton.dev by default but you can configure
+your own instance of the Tekton Hub by setting the `TEKTON_HUB_API` environment
+variable in
 [`../config/resolvers/resolvers-deployment.yaml`](../config/resolvers/resolvers-deployment.yaml). Example:
 
 ```yaml

go.mod

@@ -190,7 +190,7 @@ require (
 	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
 	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/google/gofuzz v1.2.0 // indirect
-	github.com/hashicorp/go-version v1.6.0 // indirect
+	github.com/hashicorp/go-version v1.6.0
 	github.com/imdario/mergo v0.3.13 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
 	github.com/josharian/intern v1.0.0 // indirect