Build example and local backend conditionaly

* `make` will build the cli with all backends exnabled
* `make cross` will cross build without the example and local backend

You can still cross compile with all backends by doing

```console
$ BUILD_TAGS=example,local make cross
```

Signed-off-by: Djordje Lukic <djordje.lukic@docker.com>

.github/workflows/ci.yml

@@ -46,9 +46,13 @@ jobs:
             ${{ runner.os }}-go-
 
       - name: Test
+        env:
+          BUILD_TAGS: example,local
         run: make -f builder.Makefile test
 
       - name: Build
+        env:
+          BUILD_TAGS: example,local
         run: make -f builder.Makefile cli
 
       - name: E2E Test
@@ -77,9 +81,13 @@ jobs:
             ${{ runner.os }}-go-
 
       - name: Test
+        env:
+          BUILD_TAGS: example,local
         run: make -f builder.Makefile test
 
       - name: Build
+        env:
+          BUILD_TAGS: example,local
         run: make -f builder.Makefile cli
 
       - name: E2E Test

.github/workflows/release.yaml

@@ -3,7 +3,7 @@ name: releaser
 on:
   push:
     tags:
-      - 'v*'
+      - "v*"
 jobs:
   upload-release:
     runs-on: ubuntu-latest
@@ -32,4 +32,3 @@ jobs:
           artifacts: "bin/*"
           prerelease: true
           token: ${{ secrets.GITHUB_TOKEN }}
-