fix betreft email voor invite pt 3

src/main/java/nl/veenm/paypoint/service/EmailTemplateService.java

@@ -3,23 +3,29 @@ package nl.veenm.paypoint.service;
 import jakarta.enterprise.context.ApplicationScoped;
 
 import java.io.IOException;
+import java.io.InputStream;
 import java.nio.charset.StandardCharsets;
-import java.nio.file.Files;
-import java.nio.file.Path;
 import java.util.Map;
 
 @ApplicationScoped
 public class EmailTemplateService {
 
     public String loadTemplate(String templatePath, Map<String, String> replacements) {
-        try {
-            String content = Files.readString(Path.of(templatePath), StandardCharsets.UTF_8);
+        try (InputStream is = Thread.currentThread().getContextClassLoader()
+                .getResourceAsStream(templatePath)) {
 
-            for (Map.Entry<String, String> entry : replacements.entrySet()) {
-                content = content.replace("{{" + entry.getKey() + "}}", entry.getValue());
+            if (is == null) {
+                throw new RuntimeException("Kon e-mailtemplate niet vinden!");
             }
 
-            return content;
+            String template = new String(is.readAllBytes(), StandardCharsets.UTF_8);
+
+
+            for (Map.Entry<String, String> entry : replacements.entrySet()) {
+                template = template.replace("{{" + entry.getKey() + "}}", entry.getValue());
+            }
+
+            return template;
         } catch (IOException e) {
             throw new RuntimeException("Kon e-mailtemplate niet inladen: " + templatePath, e);
         }