add entrypoint and Dockerfile and rename

dom/Dockerfile

@@ -0,0 +1,8 @@
+FROM buildkite/puppeteer:latest
+
+ENV GIT_TERMINAL_PROMPT=0
+# RUN apk add --no-cache git
+WORKDIR /app
+COPY ./puppeteer .
+COPY ./subjects ./subjects
+ENTRYPOINT ["/bin/sh", "/app/entrypoint.sh"]

dom/entrypoint.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+set -o noglob
+set -o errexit
+set -o nounset
+IFS='
+'
+
+mkdir student
+cd student
+
+if test "$REPOSITORY"; then
+  password=$(cat)
+  git clone --quiet --depth=1 --shallow-submodules http://root:"${password}"@"$REPOSITORY" .
+else
+  first_file=$(echo "$EXPECTED_FILES" | cut -d' ' -f1)
+  mkdir -p "$(dirname "$first_file")"
+  cat > "$first_file"
+fi
+
+cd
+
+node --unhandled-rejections=strict /app/test.js "${EXERCISE}"