parametrized Dockerfile's base and provided a helper script

docker/Dockerfile

@@ -2,7 +2,9 @@
 # Eternal glory to him
 # Eternal suffering for every mistake
 
-FROM debian:latest
+ARG TARGET=debian:latest
+
+FROM $TARGET
 USER root
 
 RUN apt-get update -y
@@ -21,4 +23,4 @@ WORKDIR opensmt
 RUN make
 # RUN make install
 
-ENTRYPOINT ["build/opensmt"]
+# ENTRYPOINT ["build/opensmt"]

docker/build_image.sh

@@ -0,0 +1,17 @@
+#!/bin/bash
+
+DIR=$(dirname "$0")
+
+REPO=opensmt
+TAG=latest
+ARGS=()
+
+[[ -n $1 ]] && {
+    TARGET=$1
+    REPO+=-${TARGET%:*}
+    tag=${TARGET#*:}
+    [[ -n $tag ]] && TAG=$tag
+    ARGS+=(--build-arg "TARGET=$TARGET")
+}
+
+exec docker build -t $REPO:$TAG "${ARGS[@]}" "$DIR"