Fix: move commands to entrypoint

Dockerfile

@@ -2,12 +2,7 @@ FROM ghcr.io/blueprintframework/blueprint:v1.11.10
 
 ENV BASE_DIR=/srv/pterodactyl
 
-RUN ls
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
 
-COPY ./github/workspace/. /srv/pterodactyl/.blueprint/dev/
+ENTRYPOINT ["/entrypoint.sh"]
-
-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.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+set -e
+
+echo "Copying repo files into container"
+cp -r /github/workspace/. /srv/pterodactyl/.blueprint/dev/
+
+echo "Running blueprint build"
+blueprint -build
+
+identifier=$(grep -m 1 "identifier:" /srv/pterodactyl/.blueprint/dev/conf.yml | cut -d ":" -f2 | xargs)
+
+echo "Copying output back to workspace"
+cp "/srv/pterodactyl/${identifier}.blueprint" "/github/workspace/${identifier}.blueprint"
+
+# Set output if needed
+echo "blueprint_file=${identifier}.blueprint" >> $GITHUB_OUTPUT