Update dockerfile for pr-test

docker/dockerfile

@@ -24,6 +24,36 @@ CMD ["node", "server/server.js"]
 FROM release AS nightly
 RUN npm run mark-as-nightly
 
+# Build an image for testing pr
+FROM louislam/uptime-kuma:base-debian AS pr-test
+
+WORKDIR /app
+
+ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD=1
+
+## Install GitHub CLI
+RUN apt update \
+    && apt --yes --no-install-recommends install curl \
+    && curl -fsSL https://cli.github.com/packages/githubcli-archive-keyring.gpg | dd of=/usr/share/keyrings/githubcli-archive-keyring.gpg \
+    && chmod go+r /usr/share/keyrings/githubcli-archive-keyring.gpg \
+    && echo "deb [arch=$(dpkg --print-architecture) signed-by=/usr/share/keyrings/githubcli-archive-keyring.gpg] https://cli.github.com/packages stable main" | tee /etc/apt/sources.list.d/github-cli.list > /dev/null \
+    && apt update \
+    && apt install gh -y
+
+## Empty the directory, because we have to clone the Git repo.
+RUN rm -rf ./* && chown node /app
+
+USER node
+
+RUN git clone https://github.com/louislam/uptime-kuma.git .
+RUN npm ci
+
+EXPOSE 3000 3001
+VOLUME ["/app/data"]
+HEALTHCHECK --interval=60s --timeout=30s --start-period=180s --retries=5 CMD node extra/healthcheck.js
+ENTRYPOINT ["/usr/bin/dumb-init", "--", "extra/entrypoint.sh"]
+CMD ["npm", "run", "dev"]
+
 
 # Upload the artifact to Github
 FROM louislam/uptime-kuma:base-debian AS upload-artifact