test nodejs 16

package.json

@@ -34,6 +34,7 @@
         "test-install-script-alpine3": "npm run compile-install-script && docker build --progress plain -f test/test_install_script/alpine3.dockerfile .",
         "test-install-script-ubuntu": "npm run compile-install-script && docker build --progress plain -f test/test_install_script/ubuntu.dockerfile .",
         "test-install-script-ubuntu1604": "npm run compile-install-script && docker build --progress plain -f test/test_install_script/ubuntu1604.dockerfile .",
+        "test-nodejs16": "docker build --progress plain -f test/ubuntu-nodejs16.dockerfile .",
         "simple-dns-server": "node extra/simple-dns-server.js",
         "update-language-files_old": "cd extra/update-language-files && node index.js %npm_config_base_lang% && eslint ../../src/languages/**.js --fix",
         "update-language-files": "cd extra/update-language-files && node index.js && eslint ../../src/languages/**.js --fix"

test/ubuntu-nodejs16.dockerfile

@@ -0,0 +1,10 @@
+FROM ubuntu
+WORKDIR /app
+RUN apt update && apt --yes install git curl
+RUN curl -sL https://deb.nodesource.com/setup_16.x | bash -
+RUN apt --yes install nodejs
+RUN git clone https://github.com/louislam/uptime-kuma.git .
+RUN npm run setup
+
+# Option 1. Try it
+RUN node server/server.js