docker: Propagate arguments into the image environment.

Signed-off-by: Jason Volk <jason@zemos.net>

docker/Dockerfile.ingredients

@@ -24,11 +24,19 @@ ARG RUSTUP_HOME
 ARG CARGO_HOME
 ARG CARGO_TARGET
 ARG CARGO_TERM_VERBOSE=0
+ARG RUST_BACKTRACE
+ARG JEMALLOC_OVERRIDE
+#ARG ZSTD_SYS_USE_PKG_CONFIG=0
+#ARG ROCKSDB_LIB_DIR
 
 WORKDIR /usr/src/tuwunel
 COPY --link --from=source /usr/src/tuwunel .
 
 ENV CARGO_TERM_VERBOSE="${CARGO_TERM_VERBOSE}"
+ENV RUST_BACKTRACE="${RUST_BACKTRACE}"
+ENV JEMALLOC_OVERRIDE="${JEMALLOC_OVERRIDE}"
+#ENV ZSTD_SYS_USE_PKG_CONFIG="${ZSTD_SYS_USE_PKG_CONFIG}"
+#ENV ROCKSDB_LIB_DIR="${ROCKSDB_LIB_DIR}"
 RUN \
 --mount=type=cache,dst=${RUSTUP_HOME},sharing=locked \
 --mount=type=cache,dst=${CARGO_HOME},sharing=locked \