Add org.opencontainers.image.* Docker labels

Dockerfile

@@ -1,5 +1,16 @@
 FROM node:18
 
+# Set Docker labels
+LABEL org.opencontainers.image.title="ATT&CK Workbench REST API Service" \
+    org.opencontainers.image.description="This Docker image contains the REST API service of the ATT&CK Workbench, an application for exploring, creating, annotating, and sharing extensions of the MITRE ATT&CK® knowledge base. The service handles the storage, querying, and editing of ATT&CK objects. The application is built on Node.js and Express.js, and is served by the built-in web server provided by Express.js." \
+    org.opencontainers.image.source="https://github.com/center-for-threat-informed-defense/attack-workbench-rest-api" \
+    org.opencontainers.image.documentation="https://github.com/center-for-threat-informed-defense/attack-workbench-rest-api/README.md" \
+    org.opencontainers.image.url="https://ghcr.io/center-for-threat-informed-defense/attack-workbench-rest-api" \
+    org.opencontainers.image.vendor="The MITRE Corporation" \
+    org.opencontainers.image.licenses="Apache-2.0" \
+    org.opencontainers.image.authors="MITRE ATT&CK<[email protected]>" \
+    maintainer="MITRE ATT&CK<[email protected]>"
+
 # Create app directory
 WORKDIR /usr/src/app