Fix: Incorrect output var name

Create Dockerfile and action.yml

Dockerfile

@@ -1,11 +1,6 @@
 FROM ghcr.io/blueprintframework/blueprint:v1.11.10
 
-ENV BASE_DIR=/srv/pterodactyl
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
 
-COPY ./github/workspace/. /srv/pterodactyl/.blueprint/dev/
-
-RUN blueprint -build
-
-RUN identifier=$(cat /srv/pterodactyl/.blueprint/dev/conf.yml | grep -m 1 "identifier:" | cut -d ":" -f2 | xargs) && \
-    cp /srv/pterodactyl/${identifier}.blueprint /github/workspace/${identifier}.blueprint && \
-    echo "${identifier}.blueprint" >> $GITHUB_OUTPUT
+ENTRYPOINT ["/entrypoint.sh"]

entrypoint.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+set -e
+
+echo "Copying repo files into container"
+cp -R /github/workspace/. /app/.blueprint/dev/
+
+echo "Patching export script"
+sed -i '4d' /app/scripts/commands/developer/export.sh
+
+cd /app/.blueprint/dev
+ls
+
+cd /app/
+
+echo "Running blueprint export"
+blueprint -export
+
+identifier=$(grep -m 1 "identifier:" /app/.blueprint/dev/conf.yml | cut -d ":" -f2 | xargs)
+
+echo "Copying output back to workspace"
+cp "/app/${identifier}.blueprint" "/github/workspace/${identifier}.blueprint"
+
+echo "file=${identifier}.blueprint" >> $GITHUB_OUTPUT