diff --git a/.github/workflows/deploy-image.yml b/.github/workflows/build-image.yml
similarity index 93%
rename from .github/workflows/deploy-image.yml
rename to .github/workflows/build-image.yml
index 27051a1..484bcb8 100644
--- a/.github/workflows/deploy-image.yml
+++ b/.github/workflows/build-image.yml
@@ -2,6 +2,7 @@ name: Build Docker image
 
 on:
   workflow_dispatch:
+  pull_request:
   push:
     tags:
       - "v**"
@@ -37,7 +38,7 @@ jobs:
         with:
           images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
           tags: | # almost same as action default
-            type=ref,event=branch
+            type=ref,event=pr
             type=ref,event=tag,pattern={{raw}}
             # type=ref,event=workflow_dispatch
             type=sha,event=workflow_dispatch
@@ -49,7 +50,7 @@ jobs:
         uses: docker/build-push-action@v6.9.0
         with:
           context: .
-          push: true
+          push: ${{ github.event_name != 'pull_request' }}
           build-args:
             MOEFLOW_BUILD_ID=${{ github.repository }}:${{ github.ref }}:${{ github.sha }}
           cache-from:
diff --git a/Dockerfile b/Dockerfile
index 97c955d..a1fb759 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,4 +13,4 @@ WORKDIR /app
 
 EXPOSE 5000
 
-RUN make babel-update-mo
+RUN BIN_PREFIX=/usr/local/bin make babel-update-mo
diff --git a/Makefile b/Makefile
index 594e2f3..85dfd00 100644
--- a/Makefile
+++ b/Makefile
@@ -1,5 +1,7 @@
 PYTEST_COV_ARGS =
 
+BIN_PREFIX ?= venv/bin
+
 FORCE: ;
 
 create-venv:
@@ -44,11 +46,11 @@ test_logging:
 	venv/bin/pytest --capture=sys --log-cli-level=DEBUG tests/base/test_logging.py
 
 babel-update-po:
-	venv/bin/pybabel extract -F babel.cfg -k lazy_gettext -k hardcode_text -o messages.pot app
-	venv/bin/pybabel update -i messages.pot -d app/translations
+	$(BIN_PREFIX)/pybabel extract -F babel.cfg -k lazy_gettext -k hardcode_text -o messages.pot app
+	$(BIN_PREFIX)/pybabel update -i messages.pot -d app/translations
 
 babel-update-mo: babel-update-po
-	venv/bin/pybabel compile -d app/translations
+	$(BIN_PREFIX)/pybabel compile -d app/translations
 
 babel-translate-po:
 	venv/bin/python app/scripts/fill_zh_translations.py