Improve dev environment init process

This ensures that /etc/passwd is always written, regardless of how the container starts.

tools/docker-compose/entrypoint.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+if [ `id -u` -ge 500 ] || [ -z "${CURRENT_UID}" ]; then
+
+  cat << EOF > /tmp/passwd
+root:x:0:0:root:/root:/bin/bash
+awx:x:`id -u`:`id -g`:,,,:/tmp:/bin/bash
+EOF
+
+  cat /tmp/passwd > /etc/passwd
+  rm /tmp/passwd
+fi
+
+exec $@