diff --git a/.github/workflows/ci-build-release.yml b/.github/workflows/ci-build-release.yml
index 4ef3bf75..6260fecd 100644
--- a/.github/workflows/ci-build-release.yml
+++ b/.github/workflows/ci-build-release.yml
@@ -1,11 +1,15 @@
 name: Build release
 
 on:
-  workflow_dispatch:
   push:
+    branches:
+      - main
+      - master
     tags:
       - 'v*'
-  
+  pull_request:
+    branches: [ main ]
+
 concurrency:
   group: docker
   cancel-in-progress: true
@@ -33,8 +37,8 @@ jobs:
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
           format: jacoco
-        
-        
+
+
   docker-build:
     needs: [build]
     runs-on: ubuntu-latest
diff --git a/Dockerfile b/Dockerfile
index d94f9582..803667d7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,9 +12,9 @@
 ## allocate all available GPUs (only Linux with proper nvidia driver installed on host machine):
 ## docker run --rm --gpus all --init -p 8072:8072 -p 8073:8073 -v grobid.yaml:/opt/grobid/grobid-home/config/grobid.yaml:ro  lfoppiano/grobid-superconductors:0.3.0-SNAPSHOT
 
-## Transformers selection:  
+## Transformers selection:
 # --build-arg TRANSFORMERS_MODEL=mattpuscibert
-# --build-arg TRANSFORMERS_MODEL=batteryonlybert (currently disabled) 
+# --build-arg TRANSFORMERS_MODEL=batteryonlybert (currently disabled)
 
 
 # -------------------
@@ -26,7 +26,7 @@ FROM openjdk:17-jdk-slim as builder
 USER root
 
 RUN apt-get update && \
-    apt-get -y --no-install-recommends install apt-utils libxml2 git unzip 
+    apt-get -y --no-install-recommends install apt-utils libxml2 git unzip
 
 WORKDIR /opt/grobid-source
 
@@ -105,7 +105,7 @@ ENV CDE_URL "http://cde.local:8080"
 
 EXPOSE 8072 8073
 
-# RUN if [ ! -f "grobid-superconductors/grobid-superconductors-${GROBID_VERSION}-onejar.jar" ]; then mv grobid-superconductors/grobid-superconductors-*-onejar.jar grobid-superconductors/grobid-superconductors-${GROBID_VERSION}-onejar.jar; fi  
+# RUN if [ ! -f "grobid-superconductors/grobid-superconductors-${GROBID_VERSION}-onejar.jar" ]; then mv grobid-superconductors/grobid-superconductors-*-onejar.jar grobid-superconductors/grobid-superconductors-${GROBID_VERSION}-onejar.jar; fi
 
 #RUN if [ "${!GROBID_VERSION}" = "unknown" ] ; then GROBID_VERSION=`ls grobid-superconductors/grobid-superconductors-*onejar.jar |  grep -oE '[0-9]\.[0-9]\.[0-9](-SNAPSHOT)?' | head -n 1`; fi