fix: add sharp pre-built binaries config

nixpacks.toml

@@ -1,6 +1,13 @@
-# Force npm build commands with verbose logging
+# Force npm build with sharp pre-built binaries
+[variables]
+SHARP_IGNORE_GLOBAL_LIBVIPS = "1"
+npm_config_platform = "linux"
+npm_config_arch = "x64" 
+npm_config_libc = "glibc"
+CI = "true"
+
 [phases.install]
-cmds = ['npm install --verbose 2>&1 || (echo "NPM INSTALL FAILED" && exit 1)']
+cmds = ['npm install --prefer-offline --no-audit --progress=false']
 
 [phases.build]
 cmds = ['npm run build']