Replace yarn usages with NPM usages

Refs #394

README.md

@@ -71,7 +71,7 @@ glance:
   entrypoint.
 * A `dev-app` service/container based on `agdsn/pycroft-dev` derived from
   `agdsn/pycroft-base`. The development image contains additional packages
-  for development, e.g. `gcc`, `yarn`. The service uses two persistent volumes:
+  for development, e.g. `gcc`, `npm`. The service uses two persistent volumes:
   * the home directory `/opt/pycroft` of the `pycroft` user, that contains among
     other things, the virtual environment, the pip cache, and the
     `.bash_history`.
@@ -81,7 +81,7 @@ glance:
   optimized in-memory database.
 * A `prod-app` service/container based on `agdsn/pycroft-prod`, which is based on
   `agdsn/pycroft-base` that contains only the basics that are required for
-  running Pycroft without development tools, such as `gcc` or `yarn`.
+  running Pycroft without development tools, such as `gcc` or `npm`.
   Pycroft and its dependencies are build using an instance of the
   `agdsn/pycroft-develop` image using the
   [multi-stage builds](https://docs.docker.com/develop/develop-images/multistage-build/)
@@ -403,10 +403,10 @@ alias drc=docker-compose
 
 ### Webpack appears to be missing a library
 
-Re-Install everything using yarn, and re-run the webpack entrypoint.
+Re-Install everything using npm, and re-run the webpack entrypoint.
 
 ```sh
-drc run --rm dev-app shell yarn install
+drc run --rm dev-app shell npm install
 drc run --rm dev-app webpack
 ```
 

docker/base/container/commands/version

@@ -25,7 +25,6 @@ run() {
 			EOF
 	fi
 	[[ -x nodejs ]] && echo "NodeJS: $(nodejs --version)" || :
-	[[ -x yarn ]] && echo "yarn: $(yarn --version)" || :
 }
 
 [[ "$0" == "$BASH_SOURCE" ]] && run "$@" || :

docker/dev.Dockerfile

@@ -11,7 +11,6 @@ COPY etc/apt /etc/apt
 # Install Debian packages
 # Build-essential is needed For compiling things in pip
 RUN apt-key add /etc/apt/keys/nodesource.gpg.key \
-    && apt-key add /etc/apt/keys/yarnpkg.gpg.key \
     && apt-get update \
     && apt-get install -y --no-install-recommends \
         bash \
@@ -27,7 +26,6 @@ RUN apt-key add /etc/apt/keys/nodesource.gpg.key \
         strace \
         unzip \
         vim \
-        yarn \
     && apt-get clean
 
 COPY . /

docker/dev/container/commands/webpack

@@ -11,7 +11,7 @@ readonly DESCRIPTION=(
 
 run() {
 	cd /opt/pycroft/app
-	exec yarn run webpack --require @babel/register --config webpack.config.babel.js "$@"
+	exec npm run webpack --require @babel/register --config webpack.config.babel.js "$@"
 }
 
 [[ "$0" == "$BASH_SOURCE" ]] && run "$@" || :

docker/dev/container/hooks/init/20_yarn

@@ -8,4 +8,4 @@ if [[ -d node_modules ]] && $(shopt -s nullglob dotglob; files=(node_modules/*);
 	exit
 fi
 
-yarn install --network-concurrency 1
+npm install

docker/prod.Dockerfile

@@ -12,11 +12,11 @@ RUN /opt/pycroft/venv/bin/pip wheel --wheel-dir /opt/pycroft/wheel -r requiremen
 
 # Download JS/CSS dependencies
 COPY --chown=pycroft:pycroft package.json .
-RUN yarn install --network-concurrency 1
+RUN npm install
 
 # Build Pycroft wheel
 COPY --chown=pycroft:pycroft . .
-RUN yarn run --prod build
+RUN npm run --prod build
 RUN /opt/pycroft/venv/bin/pip wheel --no-deps --wheel-dir /opt/pycroft/wheel .
 
 FROM agdsn/pycroft-base