feat: docker entrypoint with environment variables (#1112)

docker/Dockerfile

@@ -11,4 +11,6 @@ VOLUME /usr/local/bin/catalyst_data
 HEALTHCHECK --interval=5s --timeout=3s --retries=3 \
   CMD curl -f http://localhost:8080/health || exit 1
 
-CMD ["/usr/local/bin/catalyst", "serve", "--http", "0.0.0.0:8080"]
+COPY docker/entrypoint.sh /entrypoint.sh
+
+CMD ["/entrypoint.sh"]

docker/entrypoint.sh

@@ -0,0 +1,15 @@
+#!/bin/bash
+
+# Set the flags
+FLAGS=""
+if [ -n "$CATALYST_FLAGS" ]; then
+    FLAGS="$CATALYST_FLAGS"
+fi
+
+# Set the app url
+APP_URL=""
+if [ -n "$CATALYST_APP_URL" ]; then
+    APP_URL="$CATALYST_APP_URL"
+fi
+
+/usr/local/bin/catalyst serve --http 0.0.0.0:8080 --flags "$FLAGS" --app-url "$APP_URL"