fix: pdf support in vips

Dockerfile

@@ -1,4 +1,4 @@
-FROM oven/bun:1.1.25-alpine as base
+FROM oven/bun:1.1.25-alpine AS base
 WORKDIR /app
 
 # install dependencies into temp directory
@@ -40,6 +40,8 @@ RUN apk --no-cache add  \
   graphicsmagick \
   ghostscript \
   vips-tools \
+  vips-poppler \
+  vips-jxl \
   libjxl-tools
 
 # this might be needed for some latex use cases, will add it if needed.

src/converters/vips.ts

@@ -113,9 +113,15 @@ export function convert(
   //     .toFormat(convertTo)
   //     .toFile(targetPath);
   // }
+  let action = "copy";
+  if (fileType === "pdf") {
+    action = "pdfload";
+  }
 
   return new Promise((resolve, reject) => {
-    exec(`vips copy "${filePath}" "${targetPath}"`, (error, stdout, stderr) => {
+    exec(
+      `vips ${action} "${filePath}" "${targetPath}"`,
+      (error, stdout, stderr) => {
         if (error) {
           reject(`error: ${error}`);
         }
@@ -129,6 +135,7 @@ export function convert(
         }
 
         resolve("success");
-    });
+      },
+    );
   });
 }