fix: apply copilot suggestions

Author: yutaro-sakamoto

.github/workflows/ci.yml

@@ -37,14 +37,14 @@ jobs:
           docker tag opensourcecobol/opensourcecobol4j:"$version_string_prefix" opensourcecobol/opensourcecobol4j:latest
 
       - name: Login to Docker Hub
-        if: github.ref == 'main' && github.event_name == 'workflow_dispatch' && inputs.push_to_dockerhub == 'true'
+        if: github.ref == 'refs/heads/main' && github.event_name == 'workflow_dispatch' && inputs.push_to_dockerhub == 'true'
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Push to Docker Hub
-        if: github.ref == 'main' && github.event_name == 'workflow_dispatch' && inputs.push_to_dockerhub == 'true'
+        if: github.ref == 'refs/heads/main' && github.event_name == 'workflow_dispatch' && inputs.push_to_dockerhub == 'true'
         run: |
           docker push opensourcecobol/opensourcecobol4j:"$version_string_prefix"
           docker push opensourcecobol/opensourcecobol4j:latest
@@ -64,18 +64,17 @@ jobs:
 
       - name: Build a docker image
         run: |
-          docker build -t opensourcecobol/opensourcecobol4j:utf8-"$version_string_prefix" . \
+          docker build -t opensourcecobol/opensourcecobol4j:utf8-"$version_string_prefix" . -f utf8.Dockerfile \
           --build-arg opensource_COBOL_4J_version="$opensource_COBOL_4J_version" \
-          --build-arg Open_COBOL_ESQL_4J_version="$Open_COBOL_ESQL_4J_version"
 
       - name: Login to Docker Hub
-        if: github.ref == 'main' && github.event_name == 'workflow_dispatch' && inputs.push_to_dockerhub == 'true'
+        if: github.ref == 'refs/heads/main' && github.event_name == 'workflow_dispatch' && inputs.push_to_dockerhub == 'true'
         uses: docker/login-action@v3
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Push to Docker Hub
-        if: github.ref == 'main' && github.event_name == 'workflow_dispatch' && inputs.push_to_dockerhub == 'true'
+        if: github.ref == 'refs/heads/main' && github.event_name == 'workflow_dispatch' && inputs.push_to_dockerhub == 'true'
         run: |
           docker push opensourcecobol/opensourcecobol4j:utf8-"$version_string_prefix"

Dockerfile

@@ -1,7 +1,7 @@
 # Build stage
 FROM almalinux:9 AS builder
 
-ARG opensource_COBOL_4J_version=1.1.12 Open_COBOL_ESQL_4J_version=1.1.1
+ARG opensource_COBOL_4J_version=dummy_value Open_COBOL_ESQL_4J_version=dummy_value
 
 SHELL ["/bin/bash", "-c"]
 

utf8.Dockerfile

@@ -1,7 +1,7 @@
 # Build stage
 FROM almalinux:9 AS builder
 
-ARG opensource_COBOL_4J_version=1.1.12 Open_COBOL_ESQL_4J_version=1.1.1
+ARG opensource_COBOL_4J_version=dummy_value
 
 SHELL ["/bin/bash", "-c"]