update to bookstack 21.04.5 and update README

Author: gritzman

Dockerfile

@@ -1,5 +1,5 @@
 FROM alpine:3 as bookstack
-ENV BOOKSTACK_VERSION=0.31.6
+ENV BOOKSTACK_VERSION=21.04.5
 RUN apk add --no-cache curl tar
 RUN set -x; \
     curl -SL -o bookstack.tar.gz https://github.com/BookStackApp/BookStack/archive/v${BOOKSTACK_VERSION}.tar.gz  \

README.md

@@ -1,103 +1,13 @@
 ## Docker Image For [BookStack](https://github.com/ssddanbrown/BookStack)
 
-[![Build Status](https://travis-ci.org/solidnerd/docker-bookstack.svg?branch=master)](https://travis-ci.org/solidnerd/docker-bookstack) [![](https://images.microbadger.com/badges/image/solidnerd/bookstack.svg)](https://microbadger.com/images/solidnerd/bookstack "Get your own image badge on microbadger.com") [![](https://images.microbadger.com/badges/commit/solidnerd/bookstack.svg)](https://microbadger.com/images/solidnerd/bookstack "Get your own commit badge on microbadger.com") [![](https://images.microbadger.com/badges/version/solidnerd/bookstack.svg)](https://microbadger.com/images/solidnerd/bookstack "Get your own version badge on microbadger.com") [![](https://images.microbadger.com/badges/license/solidnerd/bookstack.svg)](https://microbadger.com/images/solidnerd/bookstack "Get your own license badge on microbadger.com")
+This fork mainly focus to host multiple BookStack Instances on K8s in subdirectories (wiki.example.com/wiki1, wiki.example.com/wiki2, ...) without root privileges
 
-## Current Version: [0.31.6](https://github.com/SolidNerd/docker-bookstack/blob/master/Dockerfile)
+## Current Version: [21.04.5]
 
 ### Changes
 
-In 0.28.0 we changed the container http port from 80 to 8080 to allow root privileges to be dropped
-In 0.12.2 we removed `DB_PORT` . You can now specify the port via `DB_HOST` like `DB_HOST=mysql:3306`
-
-### Quickstart
-
-With Docker Compose is a Quickstart very easy. Run the following command:
-
-```
-docker-compose up
-```
-
-and after that open your Browser and go to [http://localhost:8080](http://localhost:8080) . You can login with username '[email protected]' and password 'password'.
-
-### Issues
-
-If you have any issues feel free to create an [issue on GitHub](https://github.com/solidnerd/docker-bookstack/issues).
-
-
-### How to use the Image without Docker compose
-
-Note that if you want to use LDAP, `$` has to be escape like `\$`, i.e. `-e "LDAP_USER_FILTER"="(&(uid=\${user}))"`
-
-Networking changed in Docker v1.9, so you need to do one of the following steps.
-
-#### Docker < v1.9
-
-1. MySQL Container:
-
-```bash
-docker run -d \
--p 3306:3306 \
--e MYSQL_ROOT_PASSWORD=secret \
--e MYSQL_DATABASE=bookstack \
--e MYSQL_USER=bookstack \
--e MYSQL_PASSWORD=secret \
---name bookstack_db \
-mysql:5.7.21
-```
-2. BookStack Container:
-
-```bash
-docker run -d --link bookstack_db_:mysql \
--p 8080:8080 \
---name bookstack_0.31.6 \
-solidnerd/bookstack:0.31.6
-```
-
-#### Docker 1.9+
-
-1. Create a shared network:
-
-```bash
-docker network create bookstack_nw
-```
-
-2. Run MySQL container :
-
-```bash
-docker run -d --net bookstack_nw  \
--e MYSQL_ROOT_PASSWORD=secret \
--e MYSQL_DATABASE=bookstack \
--e MYSQL_USER=bookstack \
--e MYSQL_PASSWORD=secret \
- --name="bookstack_db" \
- mysql:5.7.21
-```
-
-3. Run BookStack Container
-
-```bash
-docker run -d --net bookstack_nw \
--e DB_HOST=bookstack_db:3306 \
--e DB_DATABASE=bookstack \
--e DB_USERNAME=bookstack \
--e DB_PASSWORD=secret \
--p 8080:8080 \
---name="bookstack_0.31.6" \
- solidnerd/bookstack:0.31.6
-```
-
-#### Volumes
-To access your `.env` file and important bookstack folders on your host system change `<HOST>` in the following line to your host directory and add it then to your run command:
-
-```bash
---mount type=bind,source=<HOST>/.env,target=/var/www/bookstack/.env \
--v <HOST>:/var/www/bookstack/public/uploads \
--v <HOST>:/var/www/bookstack/storage/uploads
-```
-In case of a windows host machine the .env file has to be already created in the host directory otherwise a folder named .env will be created.
-
-After these steps you can visit [http://localhost:8080](http://localhost:8080) . You can login with username '[email protected]' and password 'password'.
+Update to bookstack 21.04.5, added more environement variables (mainly for SAML auth) and mainly focus to host on K8s with subdirectory bookstack install (=> Multiple BookStack Instances with Ingress)
 
 ### Inspiration
 
-This is a fork of [Kilhog/docker-bookstack](https://github.com/Kilhog/docker-bookstack). Kilhog did the intial work, but I want to go in a different direction.
+This is a fork of [solidnerd/docker-bookstack](https://github.com/solidnerd/docker-bookstack).