diff --git a/Dockerfile b/Dockerfile
deleted file mode 100644
index cb8280d..0000000
--- a/Dockerfile
+++ /dev/null
@@ -1,14 +0,0 @@
-# Minimal dash-in-a-box for sekft trajectory generation.
-#   docker build -t sekft-dash .
-#
-# dash as the operated shell (strict POSIX, no bashisms), busybox applets for
-# the coreutils.  busybox is intentionally close to minimal POSIX so trajectories
-# transfer toward sek rather than encoding GNU-isms.  Add `coreutils findutils
-# grep sed` here if you want GNU semantics instead.
-FROM alpine:3.19
-RUN apk add --no-cache dash \
- && ln -sf /usr/bin/dash /bin/dash \
- && ln -sf /usr/bin/dash /bin/sh
-# /work is the default arena; provider files land at their absolute paths.
-RUN mkdir -p /work
-WORKDIR /work