diff --git a/README.md b/README.md
index ae28b95..074fe2f 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 [![Docker Pulls](https://img.shields.io/docker/pulls/pgollor/gitbucket.svg)](https://hub.docker.com/r/pgollor/gitbucket/)
 [![](https://images.microbadger.com/badges/image/pgollor/gitbucket:develop.svg)](https://microbadger.com/images/pgollor/gitbucket:develop "Get your own image badge on microbadger.com")
 [![](https://images.microbadger.com/badges/version/pgollor/gitbucket:develop.svg)](https://microbadger.com/images/pgollor/gitbucket:develop "Get your own version badge on microbadger.com")
-![](https://img.shields.io/github/tag-date/gitbucket/gitbucket.svg?label=gitbucket%20latest)
+[![](https://img.shields.io/github/tag-date/gitbucket/gitbucket.svg?label=gitbucket%20latest)](https://github.com/gitbucket/gitbucket/releases/latest)
 
 This docker container of [gitbucket](https://github.com/gitbucket/gitbucket.git) is in beta state!
 
@@ -58,10 +58,6 @@
 
 ### Configuration
 Please use the configuration file `gitbucket.conf` for your personal changes.
-There are three configs for gitbucket:
-- `GITBUCKET_BIND`: ip address to bind to
-- `GITBUCKET_WEB_PORT`: web port to bind to
-- `GITBUCKET_SSH_PORT`: ssh port to bind to
 
 
 ### Update
@@ -86,7 +82,7 @@
 
 #### do update
 
-1. Commit your local changes. Changes in `gitbucket.conf` will be ignored!
+1. Commit your local changes. Changes in `gitbucket.conf` will be ignored! Pull changes from repository master via `git pull` or `git merge`.
 
 2. Backup
 ```
@@ -130,6 +126,7 @@
 ```
 ./backup.sh backup all
 ```
+**Plese check if `COMPOSE_PROJECT_NAME` exists in your local `gitbucket.conf`!!!**
 
 #### Full Backup via `backup.sh`
 For backuping the mysql database and the repositories you could use the `backup.sh` script and combine it with a daily cronjob.
diff --git a/backup.sh b/backup.sh
index 4809798..481044e 100755
--- a/backup.sh
+++ b/backup.sh
@@ -1,8 +1,11 @@
 #!/bin/bash
 
 
+# get script dir path
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+
 # backup directory
-backupDir=./backup
+backupDir="${SCRIPT_DIR}/backup"
 
 # current date
 currentDate=$(date +"%Y-%m-%d_%H-%M-%S")
@@ -32,10 +35,16 @@
 fi
 
 
+# get compose project name to backup data from correct container
+source ${SCRIPT_DIR}/gitbucket.conf
+CMPS_PRJ=$(echo $COMPOSE_PROJECT_NAME | tr -cd "[A-Za-z-_]")
+echo "backup files from ${CMPS_PRJ} project"
+
+
 function backup() {
 
-	IDmain=$(docker ps -qf name=main-gitbucket)
-	IDdb=$(docker ps -qf name=mysql-gitbucket)
+	IDmain=$(docker ps -qf name=${CMPS_PRJ}_main-gitbucket)
+	IDdb=$(docker ps -qf name=${CMPS_PRJ}_mysql-gitbucket)
 
 	while (( "$#" )); do
 	case "$1" in
@@ -109,7 +118,7 @@
 		exit 1
 	fi
 
-	IDmain=$(docker ps -qf name=main-gitbucket)
+	IDmain=$(docker ps -qf name=${CMPS_PRJ}_main-gitbucket)
 
 	echo "restore ssh keys"
 	docker cp "${backupDir}/gitbucket.ser" ${IDmain}:/srv/gitbucket/gitbucket.ser
diff --git a/docker-compose.yml b/docker-compose.yml
index f02ef95..a5ccfc9 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,6 +3,7 @@
 services:
     main-gitbucket:
       image: pgollor/gitbucket:develop
+      build: ./docker/
       mem_limit: 2g
       restart: always
       depends_on:
@@ -10,10 +11,11 @@
           condition: service_healthy
       environment:
         - GITBUCKET_USER_ID=${GITBUCKET_USER_ID:-9000}
-        - GITBUCKET_DATABASE_HOST=172.22.2.251
+        - GITBUCKET_DATABASE_HOST=database
         - GITBUCKET_DATABASE_NAME=${GITBUCKET_DATABASE_NAME}
         - GITBUCKET_DATABASE_USER=${GITBUCKET_DATABASE_USER}
         - GITBUCKET_DATABASE_PASSWORD=${GITBUCKET_DATABASE_PASSWORD}
+        - GITBUCKET_MAX_FILE_SIZE=${GITBUCKET_MAX_FILE_SIZE:-10485760}
         - TZ=${TZ}
       volumes:
         - ./data/repositories/:/srv/gitbucket/repositories/
@@ -30,7 +32,6 @@
         - "${GITBUCKET_SSH_BIND:-127.0.0.1}:${GITBUCKET_SSH_PORT:-29418}:29418"
       networks:
         gitbucket-network:
-          ipv4_address: 172.22.2.250
           aliases:
             - gitbucket
 
@@ -54,9 +55,8 @@
         - ./data/conf/mysql:/etc/mysql/conf.d/:ro
       networks:
         gitbucket-network:
-          ipv4_address: 172.22.2.251
           aliases:
-            - mysql
+            - database
 
 networks:
   gitbucket-network:
@@ -64,8 +64,6 @@
     enable_ipv6: false
     ipam:
       driver: default
-      config:
-        - subnet: 172.22.2.0/24
 
 volumes:
   mysql-vol-1:
diff --git a/docker/Dockerfile b/docker/Dockerfile
index 2d561cb..e949564 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,14 +1,21 @@
-FROM anapsix/alpine-java:8
+FROM openjdk:8-jre-alpine
 LABEL maintainer "Pascal Gollor <pascal@pgollor.de>"
 
+ARG VCS_REF
+
+LABEL org.label-schema.vcs-url="https://gitbucket.pgollor.de/docker/gitbucket" \
+	org.label-schema.vcs-ref=$VCS_REF
+
 # ports
 EXPOSE 29418/tcp
 EXPOSE 8080/tcp
 
 # environment variables
+ENV GITBUCKET_USER_ID 9000
 ENV GITBUCKET_HOST 0.0.0.0
 ENV GITBUCKET_PORT 8080
 ENV GITBUCKET_HOME /srv/gitbucket
+ENV GITBUCKET_MAX_FILE_SIZE=10485760
 
 # create home
 RUN mkdir -p $GITBUCKET_HOME
@@ -50,4 +57,4 @@
 RUN chmod +x /docker-entrypoint.sh
 
 ENTRYPOINT ["/docker-entrypoint.sh"]
-CMD su-exec gitbucket java -jar $GITBUCKET_HOME/latest.war --host=$GITBUCKET_HOST --port=$GITBUCKET_PORT --gitbucket.home=$GITBUCKET_HOME
+CMD su-exec gitbucket java -jar $GITBUCKET_HOME/latest.war --host=$GITBUCKET_HOST --port=$GITBUCKET_PORT --gitbucket.home=$GITBUCKET_HOME --max_file_size=$GITBUCKET_MAX_FILE_SIZE
diff --git a/gitbucket.conf.example b/gitbucket.conf.example
index ef291bd..eb5378f 100644
--- a/gitbucket.conf.example
+++ b/gitbucket.conf.example
@@ -15,6 +15,9 @@
 # use setUserID.sh
 GITBUCKET_USER_ID=9000
 
+# max file size for uploaded files in bytes
+GITBUCKET_MAX_FILE_SIZE=10485760
+
 
 ## database configuration
 # mysql root user password
@@ -32,3 +35,8 @@
 
 # Timezone one of /usr/share/zoneinfo
 TZ=Europe/Berlin
+
+
+## compose project name
+# this have to be unique for more then one gitbucket instance per docker host
+COMPOSE_PROJECT_NAME=gitbucket