Include npm install in build

.ci/build

@@ -6,6 +6,7 @@ set -Eeuo pipefail
 export HOME=$(pwd)
 export CARGO_HOME=$(pwd)/.cargo
 cd wwp-repo
+ln -s ../node_modules ./node_modules
 ln -s ../target ./target
 ln -s ../wwpapp ./dist
 
@@ -13,4 +14,5 @@ echo Running tests
 cargo test --target-dir ../target --profile release
 
 echo Building assets
+npm install
 trunk build --locked --release

.ci/trunkrs-image/Dockerfile

@@ -1,6 +1,7 @@
 FROM rust
 RUN apt-get -y update && \
     apt-get -y install \
+    npm \
     binaryen \
     build-essential \
     git \

.concourse.yml

@@ -19,6 +19,7 @@ jobs:
         caches:
           - path: target
           - path: .cargo
+          - path: node_modules
         outputs:
           - name: wwpapp
         run: