Fix deploy job; use absolute path for HOME

Makefile

@@ -37,7 +37,7 @@ rebuild-all: deps fetch-serverless-custom-file
 	$(SLS_BINARY) invoke stepf -n rBuilds -d '{"force": true}'
 
 serverless-deploy.%: deps fetch-serverless-custom-file
-	$(SLS_BINARY) deploy --stage $*
+	$(SLS_BINARY) deploy --stage $* --verbose
 
 define GEN_TARGETS
 docker-build-$(platform):

deploy.Jenkinsfile

@@ -3,12 +3,18 @@ pipeline {
     dockerfile {
       dir 'jenkins'
       label 'docker'
+      // Required for the serverless-python-requirements plugin to install
+      // Python requirements using the AWS build images, running Docker inside Docker.
       additionalBuildArgs '--build-arg DOCKER_GID=$(stat -c %g /var/run/docker.sock) --build-arg JENKINS_UID=$(id -u jenkins) --build-arg JENKINS_GID=$(id -g jenkins)'
       args '-v /var/run/docker.sock:/var/run/docker.sock --group-add docker'
     }
   }
   environment {
-    HOME = "."
+    // Set HOME to the workspace for the serverless-python-requirements plugin.
+    // The plugin uses HOME for its default cache location, which needs to be
+    // mounted in the separate Python build container. This needs to be an absolute
+    // path that also exists on the host since we're mounting the Docker socket.
+    HOME = "${env.WORKSPACE}"
   }
   options {
     ansiColor('xterm')

serverless.yml

@@ -11,7 +11,10 @@ package:
     - integration/**
     - builder/**
     - docs/**
+    # Generated files by other tools
     - node_modules/**
+    - .npm/**
+    - .cache/**
 
 provider:
   name: aws