Fix markdown export (#2)

* Feat enable rendering of <img> tags in markdown

* Feat add chromium dependencies to Dockerfile

backend/Dockerfile

@@ -16,5 +16,17 @@ COPY --from=builder /app ./
 RUN apk upgrade --update-cache --available && \
     apk add openssl && \
     rm -rf /var/cache/apk/*
+
+RUN apk add --no-cache \
+    chromium \
+    nss \
+    freetype \
+    harfbuzz \
+    ca-certificates \
+    ttf-freefont
+
+ENV PUPPETEER_SKIP_CHROMIUM_DOWNLOAD true
+ENV PUPPETEER_EXECUTABLE_PATH /usr/bin/chromium-browser
+
 EXPOSE 3000
-CMD ["npm", "run", "start:prod"]
+CMD ["npm", "run", "start:prod"]

backend/src/files/files.service.ts

@@ -19,13 +19,18 @@ import { ExportFileRequestBody, ExportFileResponse } from "./types/export-file.t
 @Injectable()
 export class FilesService {
 	private s3Client: S3Client;
-	private readonly markdown = new MarkdownIt();
+	private readonly markdown: MarkdownIt;
 
 	constructor(
 		private configService: ConfigService,
 		private prismaService: PrismaService
 	) {
 		this.s3Client = new S3Client();
+		this.markdown = new MarkdownIt({
+			html: true,
+			breaks: true,
+			linkify: true,
+		});
 	}
 
 	async createUploadPresignedUrl(