I am on Ubuntu 18.04.4 and using the current master branch (https://gitlab2.informatik.uni-wuerzburg.de/decker/decker/-/commit/bbf296e288ec18f172a797661456c32345d82438). When trying to build a docker image via `docker build -t decker .` (in the root directory) it fails with an error message: ``` (cd jquery && npm run build) /bin/bash: npm: command not found make[1]: *** [jquery/dist/jquery.min.js] Error 127 symlinks.mk:55: recipe for target 'jquery/dist/jquery.min.js' failed make[1]: Leaving directory '/decker/third-party' makefile:15: recipe for target 'clean-build' failed make: *** [clean-build] Error 2 The command '/bin/sh -c make ${MAKE_FLAGS} install' returned a non-zero code: 2 ``` So, I just added `RUN apt-get install -y npm` to the Dockerfile; however, the building process runs into another error: ``` > jquery@4.0.0-pre build /decker/third-party/jquery > npm install && grunt npm WARN deprecated resolve-url@0.2.1: https://github.com/lydell/resolve-url#deprecated npm WARN deprecated urix@0.1.0: Please see https://github.com/lydell/urix#deprecated npm WARN deprecated nomnom@1.8.1: Package no longer supported. Contact support@npmjs.com for more info. npm WARN deprecated request@2.88.2: request has been deprecated, see https://github.com/request/request/issues/3142 npm WARN deprecated chokidar@2.1.8: Chokidar 2 will break on node v14+. Upgrade to chokidar 3 with 15x less dependencies. npm WARN deprecated core-js@2.6.11: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3. npm WARN deprecated to-iso-string@0.0.2: to-iso-string has been deprecated, use @segment/to-iso-string instead. npm WARN deprecated mkdirp@0.5.1: Legacy versions of mkdirp are no longer supported. Please update to mkdirp 1.x. (Note that the API surface has changed to use Promises in 1.x.) npm WARN deprecated jade@0.26.3: Jade has been renamed to pug, please install the latest version of pug instead of jade npm WARN deprecated minimatch@0.3.0: Please update to minimatch 3.0.2 or higher to avoid a RegExp DoS issue npm WARN deprecated mkdirp@0.3.0: Legacy versions of mkdirp are no longer supported. Please update to mkdirp 1.x. (Note that the API surface has changed to use Promises in 1.x.) npm WARN deprecated samsam@1.1.2: This package has been deprecated in favour of @sinonjs/samsam npm WARN deprecated formatio@1.1.1: This package is unmaintained. Use @sinonjs/formatio instead npm ERR! Linux 5.3.0-53-generic npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "install" npm ERR! node v8.10.0 npm ERR! npm v3.5.2 npm ERR! code EMISSINGARG npm ERR! typeerror Error: Missing required argument #1 npm ERR! typeerror at andLogAndFinish (/usr/share/npm/lib/fetch-package-metadata.js:31:3) npm ERR! typeerror at fetchPackageMetadata (/usr/share/npm/lib/fetch-package-metadata.js:51:22) npm ERR! typeerror at resolveWithNewModule (/usr/share/npm/lib/install/deps.js:456:12) npm ERR! typeerror at /usr/share/npm/lib/install/deps.js:457:7 npm ERR! typeerror at /usr/share/npm/node_modules/iferr/index.js:13:50 npm ERR! typeerror at /usr/share/npm/lib/fetch-package-metadata.js:37:12 npm ERR! typeerror at addRequestedAndFinish (/usr/share/npm/lib/fetch-package-metadata.js:82:5) npm ERR! typeerror at returnAndAddMetadata (/usr/share/npm/lib/fetch-package-metadata.js:117:7) npm ERR! typeerror at pickVersionFromRegistryDocument (/usr/share/npm/lib/fetch-package-metadata.js:134:20) npm ERR! typeerror at /usr/share/npm/node_modules/iferr/index.js:13:50 npm ERR! typeerror This is an error with npm itself. Please report this error at: npm ERR! typeerror <http://github.com/npm/npm/issues> npm ERR! Please include the following file with any support request: npm ERR! /decker/third-party/jquery/npm-debug.log npm ERR! Linux 5.3.0-53-generic npm ERR! argv "/usr/bin/node" "/usr/bin/npm" "run" "build" npm ERR! node v8.10.0 npm ERR! npm v3.5.2 npm ERR! code ELIFECYCLE npm ERR! jquery@4.0.0-pre build: `npm install && grunt` npm ERR! Exit status 1 npm ERR! npm ERR! Failed at the jquery@4.0.0-pre build script 'npm install && grunt'. npm ERR! Make sure you have the latest version of node.js and npm installed. npm ERR! If you do, this is most likely a problem with the jquery package, npm ERR! not with npm itself. npm ERR! Tell the author that this fails on your system: npm ERR! npm install && grunt npm ERR! You can get information on how to open an issue for this project with: npm ERR! npm bugs jquery npm ERR! Or if that isn't available, you can get their info via: npm ERR! npm owner ls jquery npm ERR! There is likely additional logging output above. npm ERR! Please include the following file with any support request: npm ERR! /decker/third-party/jquery/npm-debug.log symlinks.mk:55: recipe for target 'jquery/dist/jquery.min.js' failed make[1]: Leaving directory '/decker/third-party' make[1]: *** [jquery/dist/jquery.min.js] Error 1 makefile:15: recipe for target 'clean-build' failed make: *** [clean-build] Error 2 ```