CCM-9857: fix layer deployment (#442)

Author: alexnuttall

infrastructure/terraform/components/app/pre.sh

@@ -2,4 +2,4 @@ npm ci
 
 npm run generate-dependencies --workspaces --if-present
 
-./lambdas/layers/pdfjs/build.sh
+$(git rev-parse --show-toplevel)/lambdas/layers/pdfjs/build.sh

infrastructure/terraform/modules/backend-api/lambda_layer_pdfjs.tf

@@ -2,6 +2,6 @@ resource "aws_lambda_layer_version" "lambda_layer_pdfjs" {
   layer_name          = "${local.csi}-nodejs20-pdfjs-dist"
   description         = "pdfjs-dist dependencies for Node.js v20"
   filename            = local.pdfjs_layer_zip
-  source_code_hash    = filebase64sha256(local.pdfjs_layer_zip)
+  source_code_hash    = filebase64sha256(local.pdfjs_layer_lockfile)
   compatible_runtimes = ["nodejs20.x"]
 }

infrastructure/terraform/modules/backend-api/locals.tf

@@ -1,9 +1,10 @@
 locals {
   csi = "${var.csi}-${var.module}"
 
-  repo_root           = abspath("${path.module}/../../../..")
+  repo_root               = abspath("${path.module}/../../../..")
   lambdas_source_code_dir = abspath("${local.repo_root}/lambdas")
   pdfjs_layer_zip         = abspath("${local.lambdas_source_code_dir}/layers/pdfjs/dist/layer/pdfjs-layer.zip")
+  pdfjs_layer_lockfile    = abspath("${local.lambdas_source_code_dir}/layers/pdfjs/package-lock.json")
 
   openapi_spec = templatefile("${path.module}/spec.tmpl.json", {
     AWS_REGION               = var.region