diff --git a/.gitignore b/.gitignore
index 7a8448b..8628dd2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,8 +17,6 @@
 
 **/bin
 **/obj
-./aas-server/users
-./aas-server/test/users
 nginx
 *.user
 *.log
@@ -45,7 +43,7 @@ temp
 swagger.json
 swagger.yaml
 projects/aas-server/src/app/routes
-projects/ass-server/src/assets/app-info.json
+./projects/ass-server/src/assets/app-info.json
 
 # System files
 .DS_Store
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 817a0fa..e6d4f5f 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -1,3 +1,6 @@
+variables:
+  NODE_IMAGE: node:20.11.1-alpine
+
 stages:
   - tag
   - build
@@ -5,7 +8,7 @@ stages:
   - deploy
 
 tag:
-  image: node:alpine3.19
+  image: $NODE_IMAGE
   stage: tag
   rules:
     - if: '$CI_COMMIT_MESSAGE !~ /(Release)/'
@@ -15,7 +18,7 @@ tag:
     - npx semantic-release
 
 build:
-  image: node:alpine3.19
+  image: $NODE_IMAGE
   stage: build
   rules:
     - if: '$CI_COMMIT_MESSAGE =~ /(Release)/'
@@ -24,7 +27,7 @@ build:
     - npm run build -ws
 
 test:
-  image: node:alpine3.19
+  image: $NODE_IMAGE
   stage: test
   rules:
     - if: '$CI_COMMIT_MESSAGE =~ /(Release)/'
diff --git a/Dockerfile b/Dockerfile
index e0f7afc..d88ea3f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # Dockerfile to build server and client parts
-FROM node:alpine3.19 AS build
+FROM node:20.11.1-alpine AS build
 WORKDIR /usr/src/app
 COPY . .
 # RUN apk add g++ make py3-pip
@@ -7,7 +7,7 @@ RUN npm install
 RUN node --no-warnings --loader ts-node/esm create-app-info.ts
 RUN npm run build
 
-FROM node:alpine3.19 AS aasportal
+FROM node:20.11.1-alpine AS aasportal
 RUN apk upgrade --update-cache --available && apk add openssl && rm -rf /var/cache/apk/*
 WORKDIR /usr/src/app
 COPY projects/aas-server/package.json package.json
diff --git a/Dockerfile.aas-portal b/Dockerfile.aas-portal
index aec5394..421bdae 100644
--- a/Dockerfile.aas-portal
+++ b/Dockerfile.aas-portal
@@ -1,5 +1,5 @@
 # Dockerfile to build server and client parts
-FROM node:alpine3.19 AS build
+FROM node:20.11.1-alpine AS build
 WORKDIR /usr/src/app
 COPY . .
 RUN npm install
diff --git a/Dockerfile.aas-server b/Dockerfile.aas-server
index 3c045c4..406c7f4 100644
--- a/Dockerfile.aas-server
+++ b/Dockerfile.aas-server
@@ -1,5 +1,5 @@
 # Dockerfile to build server and client parts
-FROM node:alpine3.19 as build
+FROM node:20.11.1-alpine as build
 WORKDIR /usr/src/app
 COPY . .
 # RUN apk add g++ make py3-pip
@@ -7,7 +7,7 @@ RUN npm install
 RUN node --no-warnings --loader ts-node/esm create-app-info.ts
 RUN npm run aas-server:build
 
-FROM node:alpine3.19 AS aas-server
+FROM node:20.11.1-alpine AS aas-server
 RUN apk upgrade --update-cache --available && apk add openssl && rm -rf /var/cache/apk/*
 WORKDIR /usr/src/app
 COPY projects/aas-server/package.json package.json