use native docker image to build

build-docker.sh

@@ -75,22 +75,7 @@ fi
 # Modify original build-options to allow config file to be mounted in the docker container
 BUILD_OPTS="$(echo "${BUILD_OPTS:-}" | sed -E 's@\-c\s?([^ ]+)@-c /config@')"
 
-# Check the arch of the machine we're running on. If it's 64-bit, use a 32-bit base image instead
-case "$(uname -m)" in
-  x86_64|aarch64)
-    case "$(uname -m)" in
-        aarch64)
-            BASE_IMAGE=arm32v7/debian:bullseye
-            ;;
-        *)
-            BASE_IMAGE=i386/debian:bullseye
-            ;;
-    esac
-    ;;
-  *)
-    BASE_IMAGE=debian:bullseye
-    ;;
-esac
+BASE_IMAGE=debian:bullseye
 ${DOCKER} build --build-arg BASE_IMAGE=${BASE_IMAGE} -t pi-gen "${DIR}"
 
 if [ "${CONTAINER_EXISTS}" != "" ]; then