Docs: Add mention to install devDependencies

Before `yarn build` can be succesfully run, we need to install the devDependencies.
This is necessary, because `bin/setup` does not install the devDependencies…

Signed-off-by: Philip Molares <philip.molares@udo.edu>

1 files changed, 1 insertions, 1 deletions

diff --git a/bin/setup b/bin/setup
index b4a7ae9d..907567ca 100755
--- a/bin/setup
+++ b/bin/setup
@@ -50,7 +50,7 @@ echo "Installing packages..."
 yarn install --production=true --pure-lockfile
 
 cat << EOF
-
+If you want to build the frontend yourself, you need to run 'yarn install' before 'yarn build' to install the devDependencies for the build process.
 
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