diff --git a/gatewayservice/Dockerfile b/gatewayservice/Dockerfile
index 136cbc0..47f2bb9 100644
--- a/gatewayservice/Dockerfile
+++ b/gatewayservice/Dockerfile
@@ -11,7 +11,7 @@ COPY package*.json ./
 RUN npm install --ignore-scripts
 
 # Copy the app source code to the working directory
-COPY . . /usr/src/gatewayservice/
+COPY gateway-service.js ./
 
 # Define the command to run your app
 CMD ["node", "gateway-service.js"]
diff --git a/questionservice/Dockerfile b/questionservice/Dockerfile
index 438c0b9..3fe633a 100644
--- a/questionservice/Dockerfile
+++ b/questionservice/Dockerfile
@@ -14,7 +14,8 @@ RUN npm install axios --ignore-scripts
 RUN npm install --ignore-scripts
 
 # Copy the app source code to the working directory
-COPY . . /usr/src/questionservice/
+COPY server.js ./
+COPY questions.json ./
 
 # Define the command to run your app
 CMD ["node", "server.js"]
diff --git a/questionservice/server.js b/questionservice/server.js
index c816c78..28e42c2 100644
--- a/questionservice/server.js
+++ b/questionservice/server.js
@@ -70,7 +70,9 @@ app.get('/pregunta', async (req, res) => {
         }
         // Mezclamos las respuestas
         for (let i = answers.length - 1; i > 0; i--) {
-            const j = Math.floor(Math.random() * (i + 1));
+            buf = crypto.randomBytes(1)
+            randomValue = buf[0]/255
+            const j = Math.floor(randomValue * (i + 1));
             // Intercambiamos las respuestas en los índices i y j
             [answers[i], answers[j]] = [answers[j], answers[i]];
         }
diff --git a/sonar-project.properties b/sonar-project.properties
index acbc46c..c96a4d3 100644
--- a/sonar-project.properties
+++ b/sonar-project.properties
@@ -11,7 +11,8 @@ sonar.language=js
 sonar.projectName=wiq_es05a
 
 sonar.coverage.exclusions=**/*.test.js
-sonar.coverage.exclusions=*
+sonar.coverage.exclusions=**/*.json, **/*.yaml
+sonar.coverage.exclusions=**/Dockerfile, **/*.dockerfile
 sonar.sources=webapp/src/components,userservice/authservice,userservice/userservice,gatewayservice,questionservice
 sonar.sourceEncoding=UTF-8
 sonar.exclusions=node_modules/**
diff --git a/userservice/authservice/Dockerfile b/userservice/authservice/Dockerfile
index d6d0fb5..e5fc65d 100644
--- a/userservice/authservice/Dockerfile
+++ b/userservice/authservice/Dockerfile
@@ -11,7 +11,8 @@ COPY package*.json ./
 RUN npm install --ignore-scripts
 
 # Copy the app source code to the working directory
-COPY . . / /usr/src/authservice/
+COPY auth-service.js ./
+COPY auth-model.js ./
 
 # Expose the port the app runs on
 EXPOSE 8002
diff --git a/userservice/userservice/Dockerfile b/userservice/userservice/Dockerfile
index d8f9099..d80ffb6 100644
--- a/userservice/userservice/Dockerfile
+++ b/userservice/userservice/Dockerfile
@@ -11,7 +11,8 @@ COPY package*.json ./
 RUN npm install --ignore-scripts
 
 # Copy the app source code to the working directory
-COPY . . /usr/src/userservice/
+COPY user-service.js ./
+COPY user-model.js ./
 
 # Expose the port the app runs on
 EXPOSE 8001