Housekeeping (#8)

* Rename the provider to dockerbuild.
* Add Makefile targets required by CI.
* Add per-language test targets compatible with CI.
* Fix broken example yaml.
* Add gitignore exclusions to fix SDK generation in CI.
* Fix lint errors.
* Vendor pulumi CLI via `tools.go` instead of `.pulumi`.
* Consolidate `go.mod`s into one file, with a minimal `go.mod` for the
Go SDK.
* Add codecov.

sdk/nodejs/package.json

@@ -1,16 +1,16 @@
 {
-    "name": "@pulumi/docker-native",
+    "name": "@pulumi/dockerbuild",
     "version": "${VERSION}",
     "keywords": [
         "keywords"
     ],
     "homepage": "pulumi.com",
-    "repository": "https://github.com/pulumi/pulumi-docker-native",
+    "repository": "https://github.com/pulumi/pulumi-dockerbuild",
     "scripts": {
         "build": "tsc"
     },
     "dependencies": {
-        "@pulumi/pulumi": "^3.42.0"
+        "@pulumi/pulumi": "^3.0.0"
     },
     "devDependencies": {
         "@types/node": "^14",
@@ -18,7 +18,7 @@
     },
     "pulumi": {
         "resource": true,
-        "name": "docker-native",
-        "server": "github.com/pulumi/pulumi-docker-native"
+        "name": "dockerbuild",
+        "server": "github.com/pulumi/pulumi-dockerbuild"
     }
 }