Add docker image build scripts

docker/entrypoint.sh

@@ -0,0 +1,41 @@
+#!/bin/sh
+
+# Protect against buggy runc in docker <20.10.6 causing problems in with Alpine >= 3.14
+if [ ! -x /bin/sh ]; then
+  echo "Executable test for /bin/sh failed. Your Docker version is too old to run Alpine 3.14+ and Gitea. You must upgrade Docker.";
+  exit 1;
+fi
+
+if [ "${USER}" != "transcriber" ]; then
+    # Rename user
+    sed -i -e "s/^transcriber\:/${USER}\:/g" /etc/passwd
+fi
+
+if [ -z "${USER_GID}" ]; then
+  USER_GID="$(id -g ${USER})"
+fi
+
+if [ -z "${USER_UID}" ]; then
+  USER_UID="$(id -u ${USER})"
+fi
+
+# Change GID for USER?
+if [ -n "${USER_GID}" ] && [ "${USER_GID}" != "$(id -g ${USER})" ]; then
+    sed -i -e "s/^${USER}:\([^:]*\):[0-9]*/${USER}:\1:${USER_GID}/" /etc/group
+    sed -i -e "s/^${USER}:\([^:]*\):\([0-9]*\):[0-9]*/${USER}:\1:\2:${USER_GID}/" /etc/passwd
+fi
+
+# Change UID for USER?
+if [ -n "${USER_UID}" ] && [ "${USER_UID}" != "$(id -u ${USER})" ]; then
+    sed -i -e "s/^${USER}:\([^:]*\):[0-9]*:\([0-9]*\)/${USER}:\1:${USER_UID}:\2/" /etc/passwd
+fi
+
+for FOLDER in /data /config; do
+    mkdir -p ${FOLDER}
+done
+
+if [ $# -gt 0 ]; then
+    exec "$@"
+else
+    exec ./transcriber
+fi