Pass in base image name as an argument.

.github/workflows/dockerhub.yml

@@ -3,6 +3,7 @@ on: [push, pull_request]
 
 env:
   PLATFORMS: linux/amd64,linux/i386,linux/arm/v7,linux/arm64
+  BASE_IMAGE: debian:12-slim
 
 jobs:
   check_disabled_actions:
@@ -63,6 +64,7 @@ jobs:
       with:
         context: .
         file: ./docker/Dockerfile
+        build-args: BASE_IMAGE=${{ env.BASE_IMAGE }}
         tags: |
           ${{ steps.meta.outputs.tags }}
           sippylabs/rtpproxy:${{ github.sha }}
@@ -75,6 +77,7 @@ jobs:
       with:
         context: .
         file: ./docker/Dockerfile.push
+        build-args: BASE_IMAGE=${{ env.BASE_IMAGE }}
         push: true
         tags: ${{ steps.meta.outputs.tags }}
         labels: ${{ steps.meta.outputs.labels }}

docker/Dockerfile

@@ -1,4 +1,5 @@
-FROM --platform=$TARGETPLATFORM debian:12-slim as build
+ARG BASE_IMAGE
+FROM --platform=$TARGETPLATFORM $BASE_IMAGE as build
 LABEL maintainer="Maksym Sobolyev <[email protected]>"
 
 USER root

docker/Dockerfile.push

@@ -1,4 +1,5 @@
-FROM --platform=$TARGETPLATFORM debian:12-slim as build
+ARG BASE_IMAGE
+FROM --platform=$TARGETPLATFORM $BASE_IMAGE as build
 LABEL maintainer="Maksym Sobolyev <[email protected]>"
 
 USER root
@@ -18,5 +19,5 @@ RUN ls -l /usr/local/lib/*rtpproxy*
 WORKDIR /
 RUN rm -rf /rtpproxy && rm -rf /var/cache/*
 
-FROM --platform=$TARGETPLATFORM debian:12-slim
+FROM --platform=$TARGETPLATFORM $BASE_IMAGE
 COPY --from=build / /