diff --git a/Jenkinsfile b/Jenkinsfile
index ea9bc57..b4d0d88 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -148,7 +148,7 @@ ansiColor('xterm') {
             'workbench': {
                 node('docker') {
                     checkout scm
-                    def launcher_image = pullBuildPush(
+                    def workbench_image = pullBuildPush(
                             image_name: 'workbench',
                             image_tag: "${RSPVersion}",
                             build_args: "--build-arg RSP_VERSION=${RSPVersion}",
@@ -160,7 +160,7 @@ ansiColor('xterm') {
                             registry_url: 'https://075258722956.dkr.ecr.us-east-1.amazonaws.com',
                             push: pushImage
                     )
-                    print "Finished launcher"
+                    print "Finished workbench"
                 }
             },
     '4.0': {
diff --git a/helper/workbench/startup.sh b/helper/workbench/startup.sh
index bf7b801..be970eb 100644
--- a/helper/workbench/startup.sh
+++ b/helper/workbench/startup.sh
@@ -24,6 +24,30 @@ deactivate() {
 }
 trap deactivate EXIT
 
+# usage: use_init_files [file [file [...]]]
+#    ie: use_init_files /mydir/*
+# execute or source initialization files (file extensions and permissions)
+use_init_files() {
+    echo
+    local file
+    for file; do
+        case "$file" in
+            *.sh)
+                if [ -x "$file" ]; then
+                    echo "$0: executing file $file"
+                    "$file"
+                else
+                    echo "$0: sourcing file $file"
+                    echo "$0: no execute bit set"
+                    . "$file"
+                fi
+                ;;
+            *)  echo "$0: ignoring $file" ;;
+        esac 
+        echo
+    done
+}
+
 # touch log files to initialize them
 su rstudio-server -c 'touch /var/lib/rstudio-server/monitor/log/rstudio-server.log'
 mkdir -p /var/lib/rstudio-launcher
@@ -63,10 +87,16 @@ else
     fi
 fi
 
+# Execute or source *.sh files from /entrypoint.d/
+# - note that order should be deterministic thanks to * magic
+use_init_files /entrypoint.d/*
+
 # Start Launcher
 if [ "$RSP_LAUNCHER" == "true" ]; then
-  /usr/lib/rstudio-server/bin/rstudio-launcher >> /var/log/rstudio-launcher.log 2>&1 &
+  /usr/lib/rstudio-server/bin/rstudio-launcher > /var/log/rstudio-launcher.log 2>&1 &
   wait-for-it.sh localhost:5559 -t $RSP_LAUNCHER_TIMEOUT
+else
+  touch /var/log/rstudio-launcher.log
 fi
 
 tail -n 100 -f \
@@ -79,4 +109,4 @@ tail -n 100 -f \
 
 # the main container process
 # cannot use "exec" or the "trap" will be lost
-/usr/lib/rstudio-server/bin/rserver --server-daemonize 0 >> /var/log/rstudio-server.log 2>&1
+/usr/lib/rstudio-server/bin/rserver --server-daemonize 0 > /var/log/rstudio-server.log 2>&1