chore: provide a simple asdf wrapper script.

Dockerfile

@@ -27,6 +27,8 @@ RUN groupadd --gid ${USER_GID} ${USERNAME}
 RUN useradd --shell /usr/bin/zsh --uid ${USER_UID} --gid ${USER_GID} -m ${USERNAME}
 RUN touch /entrypoint.sh && chown ${USERNAME}:${USERNAME} /entrypoint.sh
 
+COPY asdf /usr/local/bin
+RUN chmod 755 /usr/local/bin/asdf
 COPY asdf_install /usr/local/bin
 RUN chmod 755 /usr/local/bin/asdf_install
 

asdf

@@ -0,0 +1,4 @@
+#!/bin/bash
+
+source ~/.asdf/asdf.sh
+exec "$@"