minor fixes

install/papermark-install.sh

@@ -34,7 +34,9 @@ EOF
 $STD npm install
 $STD npx prisma generate
 $STD npx prisma migrate deploy
-node -e "['next.config.js','next.config.mjs','next.config.ts'].forEach(n=>{try{const fp='/opt/papermark/'+n,fs=require('fs');let c=fs.readFileSync(fp,'utf8');c=c.replace(/\{(\s*)type(\s*):(\s*)['\"]host['\"](\s*)\}/g,'{type:\"host\",value:\".*\"}');fs.writeFileSync(fp,c)}catch(e){}})" 2>/dev/null || true
+for f in next.config.js next.config.mjs next.config.ts; do
+  [[ -f "/opt/papermark/$f" ]] && sed -i 's/{"type":"host"}/{"type":"host","value":".*"}/g' "/opt/papermark/$f"
+done
 $STD npm run build
 msg_ok "Set up Papermark"