fix proto generation (#8361)

* fix proto generation

* merge grpc_gateway into gocosmos_out

* change env variable names

.github/workflows/proto-docker.yml

@@ -0,0 +1,44 @@
+name: Build & Push SDK Proto Builder
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - "contrib/devtools/dockerfile"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: Prepare
+        id: prep
+        run: |
+          DOCKER_IMAGE=tendermintdev/sdk-proto-gen
+          VERSION=noop
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF#refs/tags/}
+          elif [[ $GITHUB_REF == refs/heads/* ]]; then
+            VERSION=$(echo ${GITHUB_REF#refs/heads/} | sed -r 's#/+#-#g')
+            if [ "${{ github.event.repository.default_branch }}" = "$VERSION" ]; then
+              VERSION=latest
+            fi
+          fi
+          TAGS="${DOCKER_IMAGE}:${VERSION}"
+          echo ::set-output name=tags::${TAGS}
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUBTM_USERNAME }}
+          password: ${{ secrets.DOCKERHUBTM_TOKEN }}
+
+      - name: Publish to Docker Hub
+        uses: docker/build-push-action@v2
+        with:
+          context: ./docker-build-sdk-proto
+          file: ./docker-build-sdk-proto/Dockerfile
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.prep.outputs.tags }}