Include Saxon dependencies in runtime

README.md

@@ -49,6 +49,8 @@ docker build -t xslt-playground-backend backend
 ```
 
 By default it listens on port `8000` as configured in `backend/app.config`.
+The same file sets `saxon_classpath` so the Java process can load Saxon and
+its dependencies from `/opt/saxon/*`.
 
 ### Environment
 
@@ -58,6 +60,7 @@ authentication. Provide these via environment variables:
 ```bash
 export DATABASE_URL="postgres://user:pass@localhost/dbname"
 export GOOGLE_APPLICATION_CREDENTIALS=/path/to/serviceAccount.json
+export SAXON_CLASSPATH=/opt/saxon/*
 ```
 
 The Firebase project ID is read from the credentials file.

backend/Dockerfile

@@ -7,13 +7,11 @@ RUN apk add --no-cache git
 # Establecer directorio de trabajo
 WORKDIR /app/src
 
-# Copiar los archivos
-COPY src/ .
+# Copiar los archivos del backend
+COPY src/ ./
 
-# Compilar el binario estático
-RUN go mod init xslt-playground && \
-    go get github.com/gin-gonic/gin && \
-    go build -o server .
+# Descargar dependencias y compilar
+RUN go mod tidy && go build -o server .
 
 # Etapa final (runtime)
 FROM alpine:latest
@@ -30,7 +28,8 @@ COPY src/app.config .
 
 # Crear carpeta para Saxon y descargarlo
 RUN mkdir -p /opt/saxon && \
-    curl -L -o /opt/saxon/saxon-he.jar https://repo1.maven.org/maven2/net/sf/saxon/Saxon-HE/11.6/Saxon-HE-11.6.jar
+    curl -L -o /opt/saxon/saxon-he.jar https://repo1.maven.org/maven2/net/sf/saxon/Saxon-HE/11.6/Saxon-HE-11.6.jar && \
+    curl -L -o /opt/saxon/xmlresolver.jar https://repo1.maven.org/maven2/org/xmlresolver/xmlresolver/4.5.0/xmlresolver-4.5.0.jar
 
 # Exponer el puerto por defecto y ejecutar el binario
 EXPOSE 8000

backend/app.config

@@ -1,4 +1,4 @@
 {
   "port": "8000",
-  "saxon_path": "/opt/saxon/saxon-he.jar"
+  "saxon_classpath": "/opt/saxon/*"
 }

backend/src/main.go

@@ -35,7 +35,7 @@ type TransformResponse struct {
 
 type AppConfig struct {
 	Port                string `json:"port"`
-	SaxonPath           string `json:"saxon_path"`
+	SaxonClasspath      string `json:"saxon_classpath"`
 	DatabaseURL         string `json:"database_url"`
 	FirebaseCredentials string `json:"firebase_credentials"`
 }
@@ -64,6 +64,9 @@ func loadConfig(filename string) (*AppConfig, error) {
 	if v := os.Getenv("GOOGLE_APPLICATION_CREDENTIALS"); v != "" {
 		config.FirebaseCredentials = v
 	}
+	if v := os.Getenv("SAXON_CLASSPATH"); v != "" {
+		config.SaxonClasspath = v
+	}
 	return &config, nil
 }
 
@@ -161,7 +164,7 @@ func main() {
 		}
 
 		cmdArgs := []string{
-			"-cp", config.SaxonPath,
+			"-cp", config.SaxonClasspath,
 			"net.sf.saxon.Transform",
 			"-s:" + inputPath,
 			"-xsl:" + xsltPath,