feat(#26): add environment variables to Dockerfile

- Added OPENAI_API_BASE for custom endpoints
- Added OPENAI_ORG_ID for organization support
- Added DOCS_MCP_EMBEDDING_MODEL for model configuration

Author: arabold

Dockerfile

@@ -31,7 +31,12 @@ COPY --from=builder /app/dist ./dist
 RUN ln -s /app/dist/cli.js /app/docs-cli
 
 # Define the data directory environment variable and volume
+# Environment variables
 ENV DOCS_MCP_STORE_PATH=/data
+ENV OPENAI_API_BASE=
+ENV OPENAI_ORG_ID=
+ENV DOCS_MCP_EMBEDDING_MODEL=
+
 VOLUME /data
 
 # Set the command to run the application