diff --git a/.gitignore b/.gitignore
index ee6ab96..84bf010 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,5 +1,6 @@
-data/repositories
-data/plugins
-data/gist
-data/data
-backup
+/data/repositories
+/data/plugins
+/data/gist
+/data/data
+/backup
+/gitbucket.conf
diff --git a/README.md b/README.md
index 0907edf..a86c0cd 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 # docker container for gitbucket
 
 [![Build Status](https://jenkins.pgollor.de/job/gitbucket-docker-master/badge/icon)](https://jenkins.pgollor.de/job/gitbucket-docker-master/)
+[![Donate](https://img.shields.io/badge/Donate-PayPal-green.svg)](https://paypal.me/pgollor)
 
 This docker container of [gitbucket](https://github.com/gitbucket/gitbucket.git) is in beta state!
 
@@ -42,22 +43,17 @@
 cd gitbucket
 ```
 
-2. Generate new passwords for your databse!!!
+2. Execute install script
 ```
-./generate_password.sh
+./install.sh
 ```
 
-3. Get latest container:
-```
-docker-compose pull
-```
-
-4. Change the confoguration and start with:
+3. Change the confoguration and start with:
 ```
 docker-compose up -d
 ```
 
-5. Open `127.0.0.1:8080` and be habby. :-)
+4. Open `127.0.0.1:8080` and be habby. :-)
 Default user and passwort are both root.
 
 
diff --git a/docker-compose.yml b/docker-compose.yml
index cceee7d..10eeede 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -20,6 +20,7 @@
         - ./data/data/:/srv/gitbucket/data/
         - ./data/gist/:/srv/gitbucket/gist/
         - ./data/plugins/:/srv/gitbucket/plugins/
+        - ./data/tmp/:/srv/gitbucket/tmp/
         - ./data/conf/gitbucket/gitbucket.conf:/srv/gitbucket/gitbucket.conf
       tmpfs:
         - /tmp
diff --git a/docker/Dockerfile b/docker/Dockerfile
index d924d4d..8c85db1 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,6 +1,10 @@
 FROM anapsix/alpine-java:8
 LABEL maintainer "Pascal Gollor <pascal@pgollor.de>"
 
+# ports
+EXPOSE 29418
+EXPOSE 8080
+
 ENV GITBUCKET_HOST 0.0.0.0
 ENV GITBUCKET_PORT 8080
 ENV GITBUCKET_HOME /srv/gitbucket
@@ -10,13 +14,14 @@
 VOLUME $GITBUCKET_HOME/data
 VOLUME $GITBUCKET_HOME/gist
 VOLUME $GITBUCKET_HOME/plugins
+VOLUME $GITBUCKET_HOME/tmp
 
 # setup
 RUN apk update
 RUN apk add ca-certificates wget su-exec git
 
 # get gitbucket
-RUN wget https://github.com/gitbucket/gitbucket/releases/download/4.19.3/gitbucket.war -O $GITBUCKET_HOME/latest.war
+RUN wget https://github.com/gitbucket/gitbucket/releases/download/4.20.0/gitbucket.war -O $GITBUCKET_HOME/latest.war
 
 # clean
 RUN apk del wget
diff --git a/generate_password.sh b/generate_password.sh
deleted file mode 100755
index 5a0c220..0000000
--- a/generate_password.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/bash
-
-pw1=$(</dev/urandom tr -dc A-Za-z0-9 | head -c 28)
-pw2=$(</dev/urandom tr -dc A-Za-z0-9 | head -c 28)
-
-sed -i "/^GITBUCKET_DATABASE_ROOT/c\\\GITBUCKET_DATABASE_ROOT=${pw1}" gitbucket.conf
-sed -i "/^GITBUCKET_DATABASE_PASSWORD/c\\\GITBUCKET_DATABASE_PASSWORD=${pw2}" gitbucket.conf
diff --git a/gitbucket.conf b/gitbucket.conf
deleted file mode 100644
index ef291bd..0000000
--- a/gitbucket.conf
+++ /dev/null
@@ -1,34 +0,0 @@
-## gitbucket configuration
-# address to bind the the web port to
-GITBUCKET_WEB_BIND=127.0.0.1
-
-# address ti bind the ssh port to
-GITBUCKET_SSH_BIND=127.0.0.1
-
-# web port
-GITBUCKET_WEB_PORT=8080
-
-# ssh port
-GITBUCKET_SSH_PORT=29418
-
-# gitbucket user id. should be the same as your current user id.
-# use setUserID.sh
-GITBUCKET_USER_ID=9000
-
-
-## database configuration
-# mysql root user password
-GITBUCKET_DATABASE_ROOT=83wwX7YMRKnVIsGIxPyPwu9u6SaZ
-
-# database for gibucket
-GITBUCKET_DATABASE_NAME=gitbucket
-
-# database user
-GITBUCKET_DATABASE_USER=gitbucket
-
-# database password
-GITBUCKET_DATABASE_PASSWORD=QzB3htEVYNV5aKd1RLFZi9LcSd2F
-
-
-# Timezone one of /usr/share/zoneinfo
-TZ=Europe/Berlin
diff --git a/gitbucket.conf.example b/gitbucket.conf.example
new file mode 100644
index 0000000..ef291bd
--- /dev/null
+++ b/gitbucket.conf.example
@@ -0,0 +1,34 @@
+## gitbucket configuration
+# address to bind the the web port to
+GITBUCKET_WEB_BIND=127.0.0.1
+
+# address ti bind the ssh port to
+GITBUCKET_SSH_BIND=127.0.0.1
+
+# web port
+GITBUCKET_WEB_PORT=8080
+
+# ssh port
+GITBUCKET_SSH_PORT=29418
+
+# gitbucket user id. should be the same as your current user id.
+# use setUserID.sh
+GITBUCKET_USER_ID=9000
+
+
+## database configuration
+# mysql root user password
+GITBUCKET_DATABASE_ROOT=83wwX7YMRKnVIsGIxPyPwu9u6SaZ
+
+# database for gibucket
+GITBUCKET_DATABASE_NAME=gitbucket
+
+# database user
+GITBUCKET_DATABASE_USER=gitbucket
+
+# database password
+GITBUCKET_DATABASE_PASSWORD=QzB3htEVYNV5aKd1RLFZi9LcSd2F
+
+
+# Timezone one of /usr/share/zoneinfo
+TZ=Europe/Berlin
diff --git a/install.sh b/install.sh
new file mode 100755
index 0000000..3f07d69
--- /dev/null
+++ b/install.sh
@@ -0,0 +1,19 @@
+#!/bin/bash
+
+
+# get user id
+uid=$(id -u)
+
+if [ ! -f "gitbucket.conf" ]; then
+	cp gitbucket.conf.example gitbucket.conf
+
+	# replace uid and gid in config file
+	sed -i "/^GITBUCKET_USER_ID/c\\\GITBUCKET_USER_ID=${uid}" gitbucket.conf
+	
+	pw1=$(</dev/urandom tr -dc A-Za-z0-9 | head -c 28)
+	pw2=$(</dev/urandom tr -dc A-Za-z0-9 | head -c 28)
+
+	# replace defautl passwords
+	sed -i "/^GITBUCKET_DATABASE_ROOT/c\\\GITBUCKET_DATABASE_ROOT=${pw1}" gitbucket.conf
+	sed -i "/^GITBUCKET_DATABASE_PASSWORD/c\\\GITBUCKET_DATABASE_PASSWORD=${pw2}" gitbucket.conf
+fi
diff --git a/setUserId.sh b/setUserId.sh
deleted file mode 100755
index 43bfec0..0000000
--- a/setUserId.sh
+++ /dev/null
@@ -1,7 +0,0 @@
-#!/bin/bash
-
-# get user id
-uid=$(id -u)
-
-# replace uid and gid in config file
-sed -i "/^GITBUCKET_USER_ID/c\\\GITBUCKET_USER_ID=${uid}" gitbucket.conf