fix: do not set database env var

Dockerfile

@@ -18,8 +18,6 @@ ARG DEBIAN_VERSION=bullseye-20250317-slim
 ARG BUILDER_IMAGE="hexpm/elixir:${ELIXIR_VERSION}-erlang-${OTP_VERSION}-debian-${DEBIAN_VERSION}"
 ARG RUNNER_IMAGE="debian:${DEBIAN_VERSION}"
 
-ARG DATABASE="/data/database"
-
 FROM ${BUILDER_IMAGE} as builder
 
 # install build dependencies
@@ -93,7 +91,6 @@ COPY --from=builder --chown=nobody:root /app/_build/${MIX_ENV}/rel/putzplan ./
 
 USER nobody
 
-ENV DATABASE=${DATABASE}
 EXPOSE 4000
 
 # If using an environment that doesn't automatically reap zombie processes, it is